Question

Mention about four types of cation involved in the formation of ionic compound

Answer 1

BASIC CONDITIONS FOR THE FORMATION OF IONIC BOND

Two atoms must be different.

Ionization potential of one atom must be small.

Electron affinity of second atom must be high.

Electro negativity of second atom must be high.

Difference of E.N. between two will be greater than or equal to 1.7.

WHICH GROUP FORM IONIC BOND:

IA, IIA, IIIA Vs VIA, VIIA

PROPERTIES OF IONIC COMPOUNDS

NON-MOLECULAR FORM

Ionic compounds are not in molecular form. Their formula only indicates the number of atoms. In ionic compounds each ion is surrounded by a number of oppositely charged ions.

STATE

Due to strong binding forces ionic compounds exist in solid form.

MELTING AND BOILING POINT

Ionic compounds have high M.P. and B.P.

HARDNESS

Due to strong attraction forces between ions, ionic compounds are very hard.

SOLUBILITY IN WATER

Ionic compounds are soluble in water except few compounds.

SOLUBILITY IN THE ORGANIC COMPOUNDS

They are insoluble in non-polar organic compounds.

ELECTRICAL CONDUCTIVITY

Ionic compounds are electrolytes because they conduct electricity in molten state and in the form of solution.

Answer 2

Explanation:

The most favourable conditions for the formation of ionic bond...

A. small cation, large anion.

B. large cation, small anion.

C. large cation, large anion.

D. small cation, small anion.