Is calcuim a mixture

Answer 1

Only of isotopes.

Calcium is an element.

No mixture of chemicals can ever be a single element.

The atoms of any element, such as calcium, always have the same number of protons and the same number of electrons.

The number of electrons in an atom is the same as the number of protons in that atom.

Different Isotopes of an element have different numbers of neutrons in the nucleus, but this doesn't change any of the chemical properties.