CHEMISTRY [1 Mark Question Answer]

When an atom gains one or more electrons, a negative ion called anion is formed.

When an atom loses one or more electrons, a positive ion called cation is formed.

The atoms of many elements cannot exist independently but molecules can exist independently.

Nucleus of an atom is present at the centre of an atom as a tiny central core containing protons and neutrons.

The subatomic particles present in an atom are electrons, protons and neutrons.

All elements can be divided into four groups, namely, metals, non-metals, metalloids and inert or noble gases.

A molecule is a group of two or more atoms that are chemically joined together.

{+1 (1 unit positive charge)}

Electrons

Neutron

Atom