The negatively charged ions are called
Atoms
Molecules
Anions
Cations
Hydrogen is a __________gas.
Monoatomic
Diatomic
Triatomic
Polyatomic
___________is a non metal exist as a liquid at room temperature.
Bromine
Mercury
Neon
Arsenic
Impure substances are
Homogeneous
Pure
Elements
Mixtures
