ATOMIC RADIUS

The atomic radius is the distance between the nucleus to the boundary of the surrounding cloud of electrons. Atomic radii vary in a predictable and […]

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ISOTOPES

Isotopes are variants of atoms of a particular chemical element. They still have the same number of protons (and belong to the same element), but […]

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MASS NUMBER

The Mass Number (A), is the total number of protons and neutrons in an atomic nucleus. The Mass Number gives the approximate weight of the […]

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MATTER and ATOMS

Matter and Atoms Atoms Atom is the smallest unit of matter that is composed of a nucleus surrounded by electrons. The atomic nucleus contains protons, […]

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