Question

1. calculate the number of valence electrons in nitrogen trichloride, ncl₃. valence electrons

Explanation:

Step1: Determine valence electrons of N

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

Step2: Determine valence electrons of each Cl

Chlorine (Cl) is in group 17, so each Cl has 7 valence electrons. There are 3 Cl atoms.

Step3: Calculate total valence electrons

Total valence electrons = valence electrons of N + (valence electrons of Cl × number of Cl atoms) = \( 5 + (7\times3) \)
\( = 5 + 21 = 26 \)

Answer:

26