Molecules & Ions

Atom

Isotopes

Atom of the same type

Same number of protons

Different number of neutrons

Made up matter

smallest particles of any element

Contain 3 basic particles

Positive protons

Neutral neutrons

Negative electrons

Electrically neutral

Form from covalent bonds between non-metals

Sharing of electrons

Mixtures

Separate by physical method

Hetrogenous

Example: Salad

Homogenous

Example: Ink

Pure compounds

Compounds

Made up of atoms of different type

Constant constituent

Different from those of its constituent elements

Produced by chemical reaction

Elements

Made up of atoms of the same type

Form from ionic bonding between metals and non-metal

Transfer of electrons

Positive Ions

Loss electrons

Negative Ions

Gain electrons