Question

1. match the atomic numbers with the elements. 2 16 27 56

Explanation:

Step1: Recall element - atomic number pairs

The atomic number is unique to each element. Helium has an atomic number of 2, sulfur has an atomic number of 16, cobalt has an atomic number of 27, and barium has an atomic number of 56.

Answer:

2 - Helium
16 - Sulfur
27 - Cobalt
56 - Barium