Question

choose all of the elements found in a family (group) with
s²np³\ electron configuration.
c
n
si
p

Explanation:

Step1: Analyze the valence - electron configuration

Elements with the general electron configuration \(ns^{2}np^{3}\) have 5 valence electrons. They belong to Group 15 (or Group VA) of the periodic table.

Step2: Check each element

• Carbon (C) has an electron configuration of \(1s^{2}2s^{2}2p^{2}\), so it does not have \(ns^{2}np^{3}\) configuration.
• Nitrogen (N) has an electron configuration of \(1s^{2}2s^{2}2p^{3}\), which is of the form \(ns^{2}np^{3}\) (\(n = 2\) here).
• Silicon (Si) has an electron configuration of \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{2}\), so it does not have \(ns^{2}np^{3}\) configuration.
• Phosphorus (P) has an electron configuration of \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{3}\), which is of the form \(ns^{2}np^{3}\) (\(n = 3\) here).

Answer:

B. N, D. P