The correct answer is b) 5.
Nitrogen is located in group 15 of the periodic table, which means it has five valence electrons. The Lewis dot symbol represents these valence electrons as dots placed around the chemical symbol of the element. For nitrogen (N), these five dots are typically arranged with one dot on three sides and a pair of dots on one side, indicating the lone pairs and the potential for bond formation with other elements. This visualization helps in understanding how nitrogen interacts with other atoms in chemical reactions.