1) The smallest part of matter which can exist freely and it has matter properties a) Atom b) Element c) Molecule d) Compound 2) The product of combination of two or more different elements with constant ratois a) Mixture b) Compound c) Atom d) Molecule 3) All the following are compounds except a) Water b) Carbon dioxide c) Ammonia d) Oxygen gas

Tabela rankingowa

Motyw

Opcje

Zmień szablon

Przywrócić automatycznie zapisane ćwiczenie: ?