Respuesta :

Answer:

1. NaCl - 2 atoms

2. K2O - 3 atoms

3. AgH - 2 atoms

Explanation:

NaCl is composed of 1 atom of Na (Sodium) and 1 of Cl (Chlorine)

K2O is composed of 2 atoms of K (Potassium) and 1 of O (Oxygen)

AgH is composed of 1 atom of Ag (Silver) and 1 of H (Hydrogen)