Choose the largest atom from each of
the following groups. Explain your answer.
a) O , N , C

C

Explanation:

Across periods, the atomic radius decreases.

The atoms and molecules in gases are much more spread out than in solids or liquids. They vibrate and move freely at high speeds. A gas will fill any container, but if the container is not sealed, the gas will escape. Gas can be compressed much more easily than a liquid or solid.

Explanation: