Question

the correct lewis structure for coh2 contains how many covalent bonds?
3
1
4
2
none are correct
question 4 (1 point)
the dot structure for nitrogen contains how many unpaired electrons?
4
2
5
1
none are correct

Explanation:

Step1: Draw Lewis structure of $COH_2$

Carbon is the central atom. Carbon has 4 valence - electrons, oxygen has 6 valence - electrons and each hydrogen has 1 valence - electron. The Lewis structure has a double - bond between C and O and single - bonds between C and each H. So, there are 2 single bonds and 1 double bond, for a total of 4 covalent bonds.

Step2: Analyze nitrogen's dot structure

Nitrogen has 5 valence electrons. Its electron configuration is $1s^{2}2s^{2}2p^{3}$. In the Lewis dot structure, there are 3 unpaired electrons in the $2p$ sub - shell.

Answer:

First question: C. 4
Second question: None are correct (the correct answer is 3)