His presence dominated the entire room.

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

This area is seriously contaminated with radioactive isotopes.

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

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

When he opened the door, a metallic sound echoed.

Transition metals play an important role in chemical reactions.

Alkali metals are highly reactive chemically.

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

He is receiving treatment for brain radiation.