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)

Explanation:

Count the number of electrons in each shell. The first shell has 2 electrons, the second has 8, the third has 8, and the fourth has 1. The total number of electrons (which is equal to the atomic number for a neutral atom) is \(2 + 8+8 + 1=19\). Potassium (K) has an atomic number of 19. Sodium (Na) has an atomic number of 11, neon (Ne) has 10, and argon (Ar) has 18.

Answer:

potassium (K)