Question

how many total valence electrons should you use to draw ammonia (nh₃)?
○ 5
○ 8
○ 1
○ 3

Explanation:

Step1: Determine valence electrons of N

Nitrogen (N) is in group 15, so it has 5 valence electrons.

Step2: Determine valence electrons of H

Hydrogen (H) is in group 1, so each H has 1 valence electron. There are 3 H atoms, so total for H: \( 3 \times 1 = 3 \).

Step3: Calculate total valence electrons

Add valence electrons of N and H: \( 5 + 3 = 8 \).

Answer:

8