Question

use the dot structure on the right and the periodic table to determine the element represented. sodium (na) potassium (k) neon (ne) argon (ar) done

Explanation:

Step1: Count electron - shell electrons

The first shell has 2 electrons, the second has 8, and the third has 8.

Step2: Calculate total electrons

$2 + 8+8=18$ electrons.

Step3: Match with periodic table

Elements have the same number of protons as electrons (in neutral state). Argon has 18 protons.

Answer:

argon (Ar)