_________ is a metalloid.
germanium
Nitrogen
Iron
Mercury
A compound containing sodium, carbon and oxygen is
Sodium carbonate
Sodium bicarbonate
Sodium hydroxide
Sodium chloride
__________ is composed of atoms of the same kind.
Elements
Compounds
Mixtures
Complexes
___________ expect solutions are heterogeneous.
Mixture
_________ is liquid at room temperature.
Gold
Copper
In a ___________ the constituents may be present in any proportion.
Molecules
__________ is a compound made up of hydrogen and oxygen combined in the ratio 2:1 by volume.
Carbondioxide
Water
Sand
Hydrogen peroxide
Each ____________ can be described by its formula, usually called molecular formula.
Atoms
___________ is the smallest particle which take part in a chemical reaction.
___________ are the substance present in a mixture.
Constituent
