_____________are pure substances.
Elements
Compounds
Mixtures
Heterogeneous
____________is a polyatomic gas.
Hydrogen
Helium
Neon
Ozone
The ratio of atomic mass by the gain of electron of an atom of carbon is known as ___________of that element.
volume
Total mass
Density
Relative atomic mass
___________are pure substances composed of two or more elements.
Atoms
Molecules
Impure substances are
Homogeneous
Pure
____________is the basic principle of chromatography.
_____________is a metal exist as a liquid at room temperature.
Bromine
Mercury
Arsenic
___________is the smallest particle of an element which can take part in a chemical reaction.
Atom
Ions
Separation of one soluble solid from the other soluble solid ,one of which sublimes on heating the mixture is the basic principle of
