Drag each tile to the correct location. Classify the elements as diatomic or monatomic. If necessary, refer to the periodic table to help you identify the diatomic elements.

Carbon, helium, and sodium are monoatomic elements.

Hydrogen, iodine, and oxygen are diatomic elements.

All the elements are arranged by melting points on the periodic table. in row they go from metals to gasses. in the row from sodium to argon, sodium is more reactive than the one on its right, magnesium.