Grade 11 Chemistry definitions Chapter 2 Chemical Bonding

Question 0

Molecule

Answer 0

Is a group of two or more atoms which are bonded together strongly enough to behave as a single unit in a chemical reaction.

Question 1

Chemical bonding

Answer 1

Is the process by which atoms bond with each other and in this way achieve a noble gas configuration, with low potential energy.

Question 2

Bond strength

Answer 2

Is the amount of energy needed to break a chemical bond.

Question 3

Bond length

Answer 3

The distance between the nuclei of the atoms.

Question 4

Valency

Answer 4

Is a measure of the number of chemical bonds formed by the atoms of a given element

Question 5

Covalent bond

Answer 5

Is a sharing of at least one pair of electrons by two atoms, forming a molecule.

Question 6

Electronegtivity

Answer 6

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

Question 7

Non-polar covalent bond

Answer 7

A covalent bond where there is an equal sharing of electrons.

Question 8

Polar covalent bond

Answer 8

Is a covalent bond where there is an unequal sharing if electrons leading to a dipole forming( as a result of electronegativity difference).

Question 9

An intermolecular force

Answer 9

Is a weak force of attraction between molecules or between atoms of a noble gas.

Question 10

An ionic bond

Answer 10

Forms due to the transfer of electrons and subsequent electrostatic attraction.

Question 11

A crystal lattice

Answer 11

A regular 3D structure of particles.

Question 12

Metallic bond

Answer 12

Is between a positive kernel and a sea of delocalised electrons.