The molecular formula of ethylene is C_2H_4. What is the total number of valence

Question

The molecular formula of ethylene is C_2H_4. What is the total number of valence electrons on the atoms in C_2H_4? Write the preliminary Lewis structure for C_2H_4 (Figure 33). Place one pair of electron dots between each pair of bonded atomic cores. What is the total number of valence electrons remaining? Add the remaining valence electrons to the structure, in accordance with the octet rule. Consider the possibility of a multiple bond between two atomic cores. Figure 33 is now the Lewis structure for C_2H_4, Construct a ball-and-stick model of C_2H_4, based on Figure 33. Use two helical springs for the C-to-C double bond. Examine your ball-and-stick model of C_2H_4, and answer the following questions: What is the molecular geometry of the C_2H_4 molecule? If your laboratory instructor requests one, make a ball-and-stick drawing (Figure 34) of C_2H_4. Acetylene The molecular formula for acetylene is C_2H_2 What is the total number of valence electrons on the atoms in C_2H_2? Write the preliminary Lewis structure for C_2H_2 (Figure 35). Place one pair of electron dots between each pair of bonded atomic cores. Figure 35 What is the total number of valence electrons remaining? Add the remaining valence electrons to the structure, in accordance with the octet rule. Consider the possibility of a multiple bond between two atomic cores. Figure 35 is now the Lewis structure for C_2H_2. Construct a ball-and-stick model of C_2H_2, based on Figure 35. Use three helical springs for the C-to-C triple bond. Examine your ball-and-stick model of C_2H_2, and answer the following questions: What is the molecular geometry of the C_2H_2 molecule? If your laboratory instructor requests one, make a ball-and-stick drawing (Figure 36 on p. 10) of C_2H_2.

Explanation / Answer

48.

1) Valence electrons in C2H4 : There are 4 valence electrons on each carbon atom (total 8 electrons) and 1 on each hydrogen atom (total 4 electrons). Hence, total Valence electrons in C2H4 are 12 electrons.

2)    

3) Total number of Valence electrons remaining are two.

4)

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