le practice Test
milk, concrete, ozone, NaCl (s), NaOH (aq), HCl (g), Ne, Cl2, CO2 (g), air, cream, HCl (aq) element: Ne, Cl2 molecule: ozone, HCl (g), Cl2, CO2 (g) compound (substance that contains atoms of different elements bonded together chemically): NaCl (s), HCl (g), Co2 (g) mixture:
- homogenous: NaOH (aq), HCl (aq)
- heterogenous: milk, concrete, cream pure substances: ozone (), HCl (g), Cl2