Chapter 3 - Atomic Combinations

Question 0

Dative covalent bond

Answer 0

A description of covalent bonding that occurs between two atoms in which both electrons shared in the bond come from the same atom.

Question 1

Covalent bond

Answer 1

A form of chemical bond where pairs of electrons are shared between atoms.

Question 2

Valence Shell Electron Pair Repulsion Theory

Answer 2

A model in chemistry, which is used to predict the shape of individual molecules. VSEPR is based upon minimising the extent of the electron-pair repulsion around the central atom being considered.

Question 3

Electronegativity

Answer 3

A chemical property which describes the power of an atom to attract electrons towards itself.

Question 4

Polar molecules

Answer 4

One that has one end with a slighlty positive charge, and one end with a slightly negative charge. Ammonia and HCl

Question 5

Non-polar molecules

Answer 5

One where the charge is equally spread across the molecule or a symmetrical molecule with polar bonds. CO2 and O2

Question 6

Bond length

Answer 6

The distance between the nuclei of two adjacent atoms when they bond.

Question 7

Bond energy

Answer 7

The amount of energy that must be added to the system to break the bond that has formed.