Matter

Element: (satu jenis shj)
sodium, Na; copper,Cu; hydrogen, H2; oxygen, O2 ;

Compound: (dua atau lebih jenis)
water, H2O; carbon dioxide, CO2; sodium chloride, NaCl

Typer of particles:
Atom: (satu sahaja)
sodium, Na; copper,Cu

Molecule: (dua atau lebih)
hydrogen, H2; oxygen, O2 ; water, H2O; carbon dioxide, CO2

Ion: (positive ion + negative ion)
sodium chloride, NaCl