Question

question 2 of 7
what is the total number of outer (valence) electrons in nitrogen dioxide, no₂?
number of valence electrons:

Explanation:

Step1: Determine valence electrons of nitrogen

Nitrogen (N) is in group 15 of the periodic table. The number of valence electrons for group 15 elements is \(5\).

Step2: Determine valence electrons of oxygen

Oxygen (O) is in group 16 of the periodic table. The number of valence electrons for group 16 elements is \(6\). There are \(2\) oxygen atoms in \(NO_2\). So the total valence electrons from oxygen is \(2\times6 = 12\).

Step3: Calculate total valence electrons

The total number of valence electrons in \(NO_2\) is the sum of valence electrons from nitrogen and oxygen. That is \(5+12=17\).

Answer:

\(17\)