His presence dominated the entire room.

This area is seriously contaminated with radioactive isotopes.

This area is affected by radioactive fallout from past nuclear tests.

This water has high alkalinity, so it is gentle on the skin.

Transition metals play an important role in chemical reactions.

When he opened the door, a metallic sound echoed.

Metallic bonds are formed by ions floating in a sea of electrons.

Electromagnetic radiation conveys energy in forms such as light and radio waves.

He is receiving treatment for brain radiation.

A cooling device utilizing the principle of radiative cooling has been developed.