Question

we can figure out what element this atom represent by counting the number of protons which will be the atomic number. this is an atom of which element? nitrogen boron other magnesium

Explanation:

To determine the element, we count the number of protons (atomic number). In the atom diagram, the red circles represent protons. Counting them, we find there are 5 protons. The atomic number 5 corresponds to Boron (B). Nitrogen has atomic number 7, Magnesium has 12, so they don't match.

Answer:

B. Boron