Question

multiple choice 1 point
how many valence electrons does nitrogen have in the ground - state (neutral)?
1
5
2
7

Explanation:

Step1: Recall nitrogen's atomic number

Nitrogen has atomic number 7.

Step2: Write electron - configuration

The electron - configuration of nitrogen (N) in the ground state is $1s^{2}2s^{2}2p^{3}$.

Step3: Identify valence electrons

Valence electrons are in the outermost shell. For nitrogen, the outermost shell is the second shell ($n = 2$), and the number of electrons in the $n=2$ shell is $2 + 3=5$.

Answer:

5