Chemical Bonding

Question 1

Define molecules.

Answer 1

Molecules are a group of atoms which is found to exist together as one species having characteristic properties.

Question 2

Define chemical bonds.

Answer 2

Chemical bond is an attractive force that holds various constituents (atoms, ions etc) together in different chemical species.

Question 3

How did various theories of valence and chemical bonds evolve?

Answer 3

Through understanding the structure of atom, electronic configuration and the periodic table.

Question 4

Why should elements have electronic bonds?

Answer 4

It is the nature’s way of lowering the energy of the system to attain stability.

Question 5

How do atoms achieve a stable octet?

Answer 5

They achieve stable octet through chemical bonds.

Question 6

List Kössel’s findings.

Answer 6

1. Highly electronegative halogens and electropositive alkali metals are seperated by noble gases.
2. Formation of charged ions from a halogen and alkali metal is associated with gain and loss of electrons.
3. Charged ions thus form stable noble gas configuration.
4. Charged ions are stabilised by electrostatic attraction.