Composition of matter

Matter

Anything that occupies space and has mass.

Mass

The quantity of matter an object has.

Element

Substances that cannot be broken down

Atom

Simplest part of an element that keeps all its properties

Nucleus

Central region.

Proton

Positivily charged

Neutron

Has no charge.

Atomic number

Number of protons in an atom.

Mass number

Equal to the total number of protons and neutrons of an atom.

Electron

Small negative charged particles.

Orbital

3-dimensioned region around the nucleus that indicates the possible location.

isotope

Atoms of the same element that have a different number of neutrons.

Compound

2+ elements that bond together

Chemical bond

Attractive forces that hold an atom together.

Covalent bond

When 2 atoms share one or more pairs of electrons.

Molecule

The simplest part of a substance that retains all the properties and can exist in the free stage.

Ion

An atom or molecule with an electrical charge.

Ionic Bond

Positive and negative electric charges attract each other.