The chemical symbol for sodium is

An.

Bs.

Cna.

Dsn. user: the most active of all the chemical elements is a halogen known as

Aiodine.

Bastatine.

Cbromine.

Dfluorine. user: dalton used the lightest element as his standard for atomic mass. what is this element?

Acarbon

Bnitrogen

Chydrogen

Doxygen