Here's how to draw the Lewis structure for a nitrogen atom:

1. Determine the number of valence electrons: Nitrogen is in group 15 of the periodic table, so it has 5 valence electrons.

2. Represent the atom with its symbol: Write "N" to represent the nitrogen atom.

3. Place dots around the symbol to represent the valence electrons: Place one dot on each side of the symbol, then start pairing them up until all five valence electrons are represented.

Here's the final Lewis structure:

N

. .

. .

Important Note: The Lewis structure only represents the valence electrons, not the inner electrons.