OBJECTIVE TYPE QUESTIONS

The basic unit of matter not capable of independent existence.

The smallest particle of a substance - capable of independent existence & which retains the characteristics of the substance.

Imaginary path around the nucleus of an atom in which electrons revolve.

The term for the combining capacity of an element or the number of hydrogen atoms with which it combines or replaces.

A molecule of a compound containing two oxygen atoms and one nitrogen atom. (Nitric oxide/Nitrogen dioxide)

Name the following:

The compound formed when iron $\left[{\mathrm{Fe}}^{2+}\right]$ combines with oxygen $\left[{\mathrm{O}}^{2-}\right]$.

The group of the Modern Periodic Table to which calcium ${\left[\mathrm{Ca}\right]}^{2+}$ belongs.

A non-metal which forms a polyatomic molecule with more than three atoms.