Chemical Bonds

Question 1

Define Molar mass

Answer 1

Mass in grams of one mole of a certain substance.

Question 2

Define Electronegativity

Answer 2

A measure of the tendency of an atom to attract a bonding pair of electrons.

Question 3

Define Ionic bond

Answer 3

Transfer of electrons and subsequent electrostatic attraction.

Question 4

Define Covalent bond

Answer 4

Sharing of at least one pair of electrons by two atoms.

Question 5

Define non-polar covalent bond (Pure covalent)

Answer 5

An equal sharing of electrons.

Question 6

Define Polar covalent bond

Answer 6

Unequal sharing of electrons leading to a dipole forming. This is the result of a difference in electronegativity between the atoms.

Question 7

Define Metallic bonding

Answer 7

The bond between a positive kernel and sea of delocalized electrons.

Question 8

Define Bond energy

Answer 8

The amount of energy that is needed to break a specific bond. Bond energy is measured in KJ.mol-1. The higher the bond energy the stronger the bond.

Question 9

Define Bond length

Answer 9

The distance between the nuclei of two covalently bonded atoms. Double and triple bonds are shorter and stronger than single bonds.