_______ are substances that cannot be separated into simpler substances.

_______ do not react chemically with other elements or compounds.

Noble gases have _________ molecules.

H₂ is

Atoms of same elements are

_________ are malleable and ductile.

Two or more atoms of the same element combine to form molecules of

Sodium and potassium are

A non - metal which is a good conductor of heat and electricity is

Table salt is a compound that can be broken down into two elements which are ______ and chlorine.