Step 1: Count the total number of valence electrons. HCCH lewis structure involves 2 atoms namely carbon and hydrogen. Carbon has 4 valence electrons and hydrogen has 1 valence electron. So according to HCCH lewis structure formula C2H2 there are a total 4×2 + 2×1 = 10 valence electrons.Step 1: Determine the valence electrons of carbon and chlorine atoms. The atomic number of carbon is 6. So its total number of electrons is six. The electron configuration of carbon shows that it has four electrons in its …Tính số electron hóa trị chưa tham gia liên kết bằng cách lấy tổng số electron trừ số electron tham gia tạo liên kết. Nguyên tử C và H đều đã được octet. Vậy công thức Lewis của C 2 H 6 là. + ∆χ (C – H) = |2,55 – 2,2| = 0,35 <0,4 …The Lewis structure of the methane (CH4) molecule is drawn with four single shared covalent bonds between the carbon and hydrogen atoms each. Moreover, as there exist sigma bonds only and one 2s and …C 2 H 2 is the simplest alkyne chemical compound with the chemical name Acetylene. Acetylene is also called Ethyne or Narcylen or Vinylene. It is widely used as a chemical building block and as a fuel. In its pure form, it is unstable and is handled as a solution. It is an unsaturated compound the two carbon atoms in it are linked together with ... A step-by-step explanation of how to draw the C2H4 Lewis Dot Structure (Ethene).For the C2H4 structure use the periodic table to find the total number of val...If you don't have the space to just leave your soldering iron sitting out all the time, Instructables user McLovinGyver shows off how to make a movable electronics station that fol...Hydrocarbon compounds are classified as organic compounds in which the molecular structure is only composed of carbon and hydrogen atoms. Each carbon atom maintains a total of 4 covalent bonds. If multiple carbon atoms are present in the hydrocarbon, then there can be some variety in the carbon-carbon bonding.This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Question: Determine the total number of valence electrons in each of the following. Express your answer as …PROBLEM 4.2.4 4.2. 4. Methanol, H 3 COH, is used as the fuel in some race cars. Ethanol, C 2 H 5 OH, is used extensively as motor fuel in Brazil. Both methanol and ethanol produce CO 2 and H 2 O when they burn. Write the chemical equations for these combustion reactions using Lewis structures instead of chemical formulas.Oct 11, 2023 · And hydrogen only needs one electron to complete its valence shell. ⇒ Valence electron in carbon = 4. ⇒ Hydrogen valence electron = 1. ∴ Total valence electrons available for C2H4 lewis structure = 4*2 + 1*4 = 12 valence electrons [∴ C2H4 has two carbon and 4 hydrogen atom] 2. Find the least electronegative atom and placed it at center. This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Question: Determine the total number of valence electrons in each of the following. Express your answer as …Step 1. To draw the Lewis structure of HCCH (acetylene), count the total number of valence electrons: Hydroge... View the full answer Step 2. Unlock. Answer. Unlock. Previous question Next question.Question: Write the electron -dot structure for the covalent compound acetylene, C2H2 . Write the electron -dot structure for the covalent compound acetylene, C2H2 . Expert Answer. Who are the experts? Experts are tested by Chegg as specialists in their subject area. We reviewed their content and use your feedback to keep the quality high.Correct answer: 10 electrons, 0 lone pairs. Each line in the Lewis structure is a bond representing a shared pair of electrons. There are 2 single bonds and 1 triple bond which contain 10 shared electrons. There are no lone pairs in this Lewis structure because all of the valence electrons are being shared in bonds.Chemistry questions and answers. Analyze the bonding in acetylene (C2H2, triple bond between carbons) molecule using the principles of valence bond theory: 1) Write down the electron configuration of C and H atoms and indicate the valence electrons engaged in bonding. 2) Knowing that the molecule is linear what kind of hybridization scheme do ...Concerns About Electronic Payment - The prevalence of identity theft makes privacy a major concern in the world of electronic payments. Learn more about electronic payment at HowSt...Answer Question 1 According to the valence bond theory, the triple bond in ethyne (acetylene, C2H2) consists of: one σ bond and two π bonds. The triple bond in ...Jan 30, 2023 · Follow these simple steps to draw Lewis dot structures: Draw the atoms on paper and put dots around them to represent valence electrons of the atom. Be sure to have the correct number of electrons. If the species is an ion, add or subtract electrons corresponding to the charge of the ion. Add an electron for every negative (-) charge, and ... 4.12 The covalent bond and molecules. 5.0 (48 reviews) A pair of electrons will be shared between the fluorine atoms. Click the card to flip 👆. Fluorine has 7 Valence electrons. Which of the following is true for a fluorine molecule (F2) Click the card to flip 👆. 1 / 5. Mass spectrum (electron ionization) Gas Chromatography; Data at other public NIST sites: Microwave spectra (on physics lab web site) Electron-Impact Ionization Cross Sections (on physics web site) Computational Chemistry Comparison and Benchmark Database; Gas Phase Kinetics Database; Options: Switch to calorie-based units; Data at NIST ...This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. See Answer. Question: How many valence electrons are in the ethylene dication C,H,? Draw the Lewis structure for the carbon dioxide (CO2) molecule. Add electro Explanation Check.In contrast, the Chlorine atom also completes its octet as it shares an electron with the Carbon atom. Carbon and Chlorine form a single bond as they share one electron to complete each other’s octet. Hence all the valence electrons are used up, and there are four single bonds in the Lewis structure of CH 3 Cl. CH3Cl HybridizationApr 28, 2022 ... C2H2 (ethyne or acetylene) HCCH, has 2 sigma bonds between the carbon ... How many valence electrons surround the xenon atom in XeF4? How ...The definition of electronegativity is: The tendency of an atom to attract electrons to form a chemical bond. The electronegativity of an atom depends upon its atomic number and its atomic radius, which means that the more the distance between the nucleus and its valence electrons, the lower the electronegativity and vice …A. Calculation of total valence electrons in C2H2. To calculate the total valence electrons in C2H2, we need to take into account the number of valence electrons of each atom in the molecule. Carbon has four valence electrons, while hydrogen has one valence electron. Since there are two carbon atoms and two hydrogen atoms in C2H2, the total ... Electronic banking takes several forms. Using a debit card, visiting an automated teller machine and banking by cellphone are all types of electronic banking. If you set up an onli...Dec 31, 2018 · In order to calculate the formal charges for C2H2 we'll use the equation:Formal charge = [# of valence electrons] - [nonbonding val electrons] - [bonding ele... Apr 14, 2021 · Now we have to count total number of C2H2 Valence electrons. 2×C = 4 ×2 =8 2×H=2×1= 2 So,the total number of C2H2 valence electrons is ten ( 8+ 2 =10) .These 10 valence electrons have two tasks at the the same time.They connect all the atoms and satisfy the duet rule of hygrogens and octet rule of two carbon atoms. Step 1: Count the total number of valence electrons. HCCH lewis structure involves 2 atoms namely carbon and hydrogen. Carbon has 4 valence electrons and hydrogen has 1 valence electron. So according to HCCH lewis structure formula C2H2 there are a total 4×2 + 2×1 = 10 valence electrons.Iodine has seven valence electrons. A valence electron is an electron in the outer shell of an atom that is able to participate in bonding. While iodine has 53 electrons, all but s...Which among the following is the correct Lewis dot structure of ethyne ( C2 H 2 )? View Solution. Q 4. C2H 2. View Solution. View Solution. Click here:point_up_2:to get an answer to your question :writing_hand:electrondot structureof ethyne c2h2.The Lewis structure of the methane (CH4) molecule is drawn with four single shared covalent bonds between the carbon and hydrogen atoms each. Moreover, as there exist sigma bonds only and one 2s and …Step 1. To draw the Lewis structure of HCCH (acetylene), count the total number of valence electrons: Hydroge... View the full answer Step 2. Unlock. Answer. Unlock. Previous question Next question.Concerns About Electronic Payment - The prevalence of identity theft makes privacy a major concern in the world of electronic payments. Learn more about electronic payment at HowSt...Oct 11, 2023 · The total valence electron is available for drawing the C2H2Cl2 lewis structure is 24. The molecular geometry of C 2 H 2 Cl 2 for both carbon central atoms is Trigonal planar. In the C 2 H 2 Cl 2 lewis structure, there are 4 single bonds, one double bond, and a total of 6 lone pairs are present. C 2 H 2 Cl 2 has three isomers – 1, 1 ... Jan 30, 2023 · Follow these simple steps to draw Lewis dot structures: Draw the atoms on paper and put dots around them to represent valence electrons of the atom. Be sure to have the correct number of electrons. If the species is an ion, add or subtract electrons corresponding to the charge of the ion. Add an electron for every negative (-) charge, and ... The chemical formula of acetylene is C2H2. How many valence electrons are associated with a molecule of acetylene? a. 4 5.5 c. 8 d. 10 37. Which of the following is true in the IUPAC system for naming alkenes? a. The alkene is named based on the longest carbon chain which contains the double bond. b. The position of the double bond is always ... This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Question: Molecule HOCN N2 C2H2 #valence electrons 6N+2= Molecular Models Data Sheet - Spring 2020 Multiple bonds? Best Lewis Structure # bonding groups on central atom #lone pairs of electrons on Name Kim Leibe VSEPR ...Science. Chemistry. Chemistry questions and answers. 1.. C2H2 Total # of Valence Electrons: 3-D Model Sketch Bond Angles Lewis Structure (show all resonance structures if applicable) Molecular Shape: Any polar bonds in the molecule? Yes No Molecular Polarity: Polar Non-Polar 2.A hydrogen atom has a valency of one as it only one electron in its outer shell. Total valence electron of CH2O= Valence electrons of Carbon + Valence electrons of Oxygen + Valence electrons of Hydrogen. = 4+6+2*1. = 12 valence electrons of CH2O. Thus, CH2O has a total of twelve valence electrons that can help in drawing its Lewis structure.Độ bất bão hòa k = số liên kết π + số vòng = (2.2 + 2 - 2) / 2 = 2. Phân tử có chứa 2 liên kết π hoặc 1 vòng + 1 liên kết π. C 2 H 2 có 1 đồng phân mạch cacbon: Đồng phân. CTCT thu gọn. Tên gọi. CH☰CH. Axetilen / Etin. Vậy ứng với …120o. Based on valence bond theory, what is the hybridization of the central atom (s) in C2F4? both carbons are sp2. Which statement best describe the structure of a carbonate anion? The electron geometry of carbon in a carbonate anion is trigonal planar with a sp2 hybridization and bond angles are 120°. There is a π-bond formed between a non ...Shape of C2H2. The structure of the C2H2 has a basic linear shape. The Carbon atoms and Hydrogen atoms are bonded and arranged in a straight line. The atom arrangement is symmetrical in the center and on any side of the molecule. Valence Electrons of C2H2. The Hydrogen atoms only need one valence electron to attain a …Jun 23, 2018 ... MBD Alchemie presents a video that explains the structure of Acetylene. Acetylene (systematic name: ethyne) is the ...All the valence electrons are used up to make the molecule’s stable structure, hence it doesn’t have any lone pairs or nonbonding pairs of electrons. The arrangement of the electrons and atoms is symmetric in this molecule. This is the Lewis Dot structure of C2H6 using up all the fourteen valence electrons. C2H6 Hybridization Apr 28, 2022 ... C2H2 (ethyne or acetylene) HCCH, has 2 sigma bonds between the carbon ... How many valence electrons surround the xenon atom in XeF4? How ...Oct 11, 2023 · The Methane (CH4) lewis structure is made up of one carbon atom that is situated at the middle position and four hydrogens atoms that are at the surrounding position. CH4 molecular geometry is tetrahedral and its electron geometry is also tetrahedral. The bond angle of CH4 is 109.5º. Jan 22, 2023 ... Ethyne is built from hydrogen atoms (1s1) and carbon atoms (1s22s22px12py1). The carbon atom does not have enough unpaired electrons to form ...Jan 23, 2023 · Ethyne is built from hydrogen atoms (1s 1) and carbon atoms (1s 2 2s 2 2p x1 2p y1 ). The carbon atom does not have enough unpaired electrons to form four bonds (1 to the hydrogen and three to the other carbon), so it needs to promote one of the 2s 2 pair into the empty 2p z orbital. This is exactly the same as happens whenever carbon forms ... A hydrogen atom has a valency of one as it only one electron in its outer shell. Total valence electron of CH2O= Valence electrons of Carbon + Valence electrons of Oxygen + Valence electrons of Hydrogen. = 4+6+2*1. = 12 valence electrons of CH2O. Thus, CH2O has a total of twelve valence electrons that can help in drawing its Lewis structure.Also, only 22 valence electrons of C2H2F2 molecule are used in the above structure. But there are total 24 valence electrons in C2H2F2 molecule (as calculated in step #1). So the number of electrons left to be kept on the carbon atom = 24 – 22 = 2. So let’s keep these two electrons (i.e 1 electron pair) on one of the central carbon atoms.Give electron dot structure for ethanoic acid CH 3COOH. Which among the following is the correct Lewis dot structure of ethyne ( C2 H 2 )? Assertion: Lewis dot structure of hydrogen has only 1 dot around it. Reason: Dots in Lewis dot structure represent the valence electron. Draw the possible isomers of the compound with molecular formula C3H6O ...Acetylene was discovered in 1836 by Edmund Davy, who identified it as a "new carburet of hydrogen". [11] [12] It was an accidental discovery while attempting to isolate potassium metal. By heating potassium carbonate with carbon at very high temperatures, he produced a residue of what is now known as potassium carbide, (K 2 C 2 ), which reacted ... Drawing the Lewis structure for C 2 H 4 (named ethene) requires the use of a double bond. In a double bond two pairs of valence electrons are shared (for a total of four valence electrons). Remember that hydrogen atoms always go on the outside of a Lewis structure and that they only need two valence electrons for a full outer shell. Video ...lewis structure. The octet rule is a fundamental concept in chemical bonding. It states that atoms tend to gain, lose, or share electrons to achieve a stable electron configuration with 8 valence electrons.This stable configuration is similar to the noble gases, which have a full outer shell.. In the case of LiCl, lithium (Li) has 1 valence …Question: 1. For each of the following atoms, determine the number of valence electrons: (a) C (b) P (c) B 2. For each of the following molecules, draw a Lewis structure, and dertemine if the molecule has a single bond, double bond, or triple bond: (a) O2 (b) HBO 2. For each of the following molecules, draw a Lewis structure, and dertemine the ...Oct 22, 2013 ... , calculate the total number of valence electrons for the C2F2 molecule. After determining how many valence electrons ...The chemical formula of acetylene is C2H2. How many valence electrons are associated with a molecule of acetylene? a. 4 6.5 Oc8 d. 10 QUESTION 21 If the bond angles at a carbon atom are 109.5, then how many groups are distributed around the carbon atom? a. 1 6.2 C3 d.4 QUESTION 22 A person drinks 1.50 103 g of water, H 2 O, per day.Step 1: Determine the valence electrons of carbon and chlorine atoms. The atomic number of carbon is 6. So its total number of electrons is six. The electron configuration of carbon shows that it has four electrons in its …Apr 14, 2021 · Now we have to count total number of C2H2 Valence electrons. 2×C = 4 ×2 =8 2×H=2×1= 2 So,the total number of C2H2 valence electrons is ten ( 8+ 2 =10) .These 10 valence electrons have two tasks at the the same time.They connect all the atoms and satisfy the duet rule of hygrogens and octet rule of two carbon atoms. In order to calculate the formal charges for C2H4 we'll use the equation:Formal charge = [# of valence electrons] - [nonbonding val electrons] - [bonding ele...Acetylene was discovered in 1836 by Edmund Davy, who identified it as a "new carburet of hydrogen". [11] [12] It was an accidental discovery while attempting to isolate potassium metal. By heating potassium carbonate with carbon at very high temperatures, he produced a residue of what is now known as potassium carbide, (K 2 C 2 ), which reacted ... The development and use of the Internet has changed the way we communicate with each other. This change extends to personal and business communications. The instantaneous nature of...All the valence electrons are used up to make the molecule’s stable structure, hence it doesn’t have any lone pairs or nonbonding pairs of electrons. The arrangement of the electrons and atoms is symmetric in this molecule. This is the Lewis Dot structure of C2H6 using up all the fourteen valence electrons. C2H6 HybridizationThe Methane (CH4) lewis structure is made up of one carbon atom that is situated at the middle position and four hydrogens atoms that are at the surrounding position. CH4 molecular geometry is tetrahedral and its electron geometry is also tetrahedral. The bond angle of CH4 is 109.5º.Benefits of Electronic Payment - The main benefit of electronic payment is the convenience it provides to consumers. Learn more about electronic payment at HowStuffWorks. Advertise...Công thức Lewis của C 2 H 2. Bài viết sau đây giúp em viết được công thức electron, công thức Lewis và công thức cấu tạo của C 2 H 2 một cách nhanh và chính xác nhất. 1. Công thức electron của C2H2. - Sự hình thành phân tử C 2 H 2: Nguyên tử H có 1 electron hóa trị, cần thêm 1 ... The valence electron configuration of carbon atom is 2s 2 2p 2 as shown in the orbital diagram. Figure 1.6g Orbital diagram of valence electrons in carbon atom …Study with Quizlet and memorize flashcards containing terms like To draw a Lewis structure, first add the number of outer (valence) electrons contributed by each atom to obtain the total number of outer electrons. What is this value for a molecule of H3COH?, Give the number of protons, neutrons, and electrons in a neutral atom represented by 25/12 Mg, Decomposition of ozone to oxygen occurs as ... Apr 12, 2020 ... sketch a picture that represents the bonding orbitals C2H2 · Write the MO configurations for tje valence electrons in C2 starting with ( σ2s)2.Ethyne, also known as acetylene, is an organic chemical compound with the chemical formula C2H2. Since the entire chemical composition only features hydrogen and carbon atoms, this compound is a hydrocarbon. Ethyne is regarded by many to be the simplest alkyne since it consists of only two carbon atoms, which are triply bonded to each other.Chemistry questions and answers. Lewis Structure # of Valence Electrons Molecular Geometry (Name and Sketch) Polar or Nonpolar? CH (acetylene) Give the molecular geometry around each carbon you do not need to sketch): NH Trigon -amid • Z- N: 5 TH-N-H H: 1 x3 H | (4 pair) NH4+ H HO CH Lewis Structure Molecular Geometry (Name and …Oct 11, 2023 · The Methane (CH4) lewis structure is made up of one carbon atom that is situated at the middle position and four hydrogens atoms that are at the surrounding position. CH4 molecular geometry is tetrahedral and its electron geometry is also tetrahedral. The bond angle of CH4 is 109.5º. Sep 10, 2013 ... For the HCN Lewis structure, calculate the total number of valence electrons for the HCN molecule.This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. See Answer. Question: How many valence electrons are in the ethylene dication C,H,? Draw the Lewis structure for the carbon dioxide (CO2) molecule. Add electro Explanation Check.1. Determine the total number of valence electrons in the molecule or ion. Each H atom (group 1) has 1 valence electron, and the O atom (group 16) has 6 …Jan 22, 2023 ... Ethyne is built from hydrogen atoms (1s1) and carbon atoms (1s22s22px12py1). The carbon atom does not have enough unpaired electrons to form ...The generalized oscillator strengths of the low-lying valence-shell excitations of N 2, O 2, and C 2 H 2 have been studied by the high-energy electron scattering, the high-resolution inelastic X-ray scattering, and the multireference single- and double-excitation configuration-interaction methods. Good agreement between the …Which among the following is the correct Lewis dot structure of ethyne ( C2 H 2 )? View Solution. Q 4. C2H 2. View Solution. View Solution. Click here:point_up_2:to get an answer to your question :writing_hand:electrondot structureof ethyne c2h2.A hydrogen atom has a valency of one as it only one electron in its outer shell. Total valence electron of CH2O= Valence electrons of Carbon + Valence electrons of Oxygen + Valence electrons of Hydrogen. = 4+6+2*1. = 12 valence electrons of CH2O. Thus, CH2O has a total of twelve valence electrons that can help in drawing its Lewis structure.Hydrocarbon compounds are classified as organic compounds in which the molecular structure is only composed of carbon and hydrogen atoms. Each carbon atom maintains a total of 4 covalent bonds. If multiple carbon atoms are present in the hydrocarbon, then there can be some variety in the carbon-carbon bonding.Study with Quizlet and memorize flashcards containing terms like Based on valence bond theory, which statement best describes the electron geometry and hybridization of the central atom(s) in acetylene (C2H2)?, Based on valence bond theory, which statement best describes the electron geometry, bonding and hybridization of the central atom in …
6 days ago · Total electron pairs = total valence electrons ÷ 2. So the total electron pairs = 16 ÷ 2 = 8. Third, determine the central atom; Here hydrogen can not be the central atom. Because the central atom is bonded with at least two other atoms, and hydrogen has only one electron in its last shell, so it can not make more than one bond. . Enterprise car rental telephone number
Acetylene was found in whole gas octane levels 87, 89 and 92 at 0.0022, 0.0032 and 0.0037 ppbC%, respectively (1). Acetylene has been detected 12%, 2.9% and 50% of total hydrocarbon concentration in emissions from vehicle exhaust, petroleum exhaust and petrochemical plants, respectively (2).Em hãy viết công thức electron, công thức Lewis của các hydrocarbon sau: C2H6, C2H4, C2H2. Nhận xét sự khác nhau về đặc điểm liên kết trong phân tử của ba hydrocarbon trên.Apr 12, 2020 ... sketch a picture that represents the bonding orbitals C2H2 · Write the MO configurations for tje valence electrons in C2 starting with ( σ2s)2.Also, only 10 valence electrons of C2H4 molecule are used in the above structure. But there are total 12 valence electrons in C2H4 molecule (as calculated in step #1). So the number of electrons left to be kept on the central carbon atoms = 12 – 10 = 2. So let’s keep these two electrons (i.e electron pair) on one of the central carbon atoms.Công thức electron của C 2 H 2 là: - Nhận xét: + Phân tử C 2 H 2 có 5 cặp electron chung, trong đó có 2 cặp electron giữa nguyên tử C và H, 3 cặp electron dùng chung giữa hai nguyên tử C. + Phân tử C 2 H 2 không có electron tự do. 2. Bài tập mở rộng về C2H2. Câu 1. Số liên kết σ trong ...This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Question: Determine the total number of valence electrons in each of the following. Express your answer as …In order to calculate the formal charges for C2H4 we'll use the equation:Formal charge = [# of valence electrons] - [nonbonding val electrons] - [bonding ele...Dec 16, 2021 · Figure 1.6c Cylindrical symmetry property of σ bond. The valence bond theory works well to explain the bonding in HF as well, with the 2p orbital of fluorine atom involved in the overlapping. The fluorine atom has the valence electron configuration of 2s 2 2p 5 as shown in the orbital diagram. Figure 1.6d Orbital diagram of valence electrons ... Jan 23, 2023 · Ethyne is built from hydrogen atoms (1s 1) and carbon atoms (1s 2 2s 2 2p x1 2p y1 ). The carbon atom does not have enough unpaired electrons to form four bonds (1 to the hydrogen and three to the other carbon), so it needs to promote one of the 2s 2 pair into the empty 2p z orbital. This is exactly the same as happens whenever carbon forms ... Độ bất bão hòa k = số liên kết π + số vòng = (2.2 + 2 - 2) / 2 = 2. Phân tử có chứa 2 liên kết π hoặc 1 vòng + 1 liên kết π. C 2 H 2 có 1 đồng phân mạch cacbon: Đồng phân. CTCT thu gọn. Tên gọi. CH☰CH. Axetilen / Etin. Vậy ứng với …For a molecule, we add the number of valence electrons (use the main group number) on each atom in the molecule. This is the total number of electrons that must be used in the Lewis structure. O + 2 (F) = OF 2. 6e-+ (2 x 7e-) = 20e-H + C + N = HCN. 1e-+ 4e-+ 5e-= 10e-2. Draw a skeleton structure of the molecule or ion, arranging …You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Question: To draw a Lewis structure, first add the number of outer (valence) electrons contributed by each atom to obtain the total number of outer electrons. What is this value for a molecule of C2H2 ? outer electrons.Iron has two valence electrons. The atomic number or iron is 26, and it has 26 electrons and 26 protons. The electron configuration of iron is 1s22s22p63s23p63d64s2 or 2, 8, 14, 2 ....