The pool water is disinfected with chlorine.

Boron is one of the elements widely distributed in the earth's crust.

Fluorine is one of the chemical elements, and its symbol is F.

Carbon is one of the basic elements of life.

Silicon is widely used in the manufacture of semiconductors.

Iodine is an important nutrient for the human body.

Bromine is a reddish-brown liquid with a strong pungent smell.

A phoneme is the smallest unit of language.

He denied the accusation against him, insisting on his innocence.

He accused his friend of wrongdoing.