A change that occurs when one or more substances change into entirely new substances with different properties

A subatomic particle that has a positive charge and that is found in the nucleus of an atom.

A subatomic particle that has a negative charge.

A subatomic Particle that has no charge and that is found in the nucleus.

The number of protons in the nucleus of an atom; the atomic number is the same for all atoms of and element.

An atom that has the same number of protons as other atoms of the same element do but that has a different number of neutrons.

The sum of the numbers of protons and neutrons in the nucleus of an atom.

The mass of an atom expressed in atomic mass units.

A measure of the size of a body or region in three-dimensional space.

Flammability

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