Module 2 Key Terms

Question 1

Nucleon

Answer 1

A particle in the nucleus

Question 2

Isoelectronic

Answer 2

Same electron configuration

Question 3

Nuclide

Answer 3

A way of describing different types of nucleus

Question 4

Relative Isotopic Mass

Answer 4

Mass of an isotope relative to 1/12 of the mass of Carbon-12

Question 5

Polyatomic Ion

Answer 5

Multiple atoms in an ion

Question 6

Covalent Bond

Answer 6

A strong bond between two non-metal atoms that share a pair of electrons

Question 7

Aqueous

Answer 7

Dissolved in water

Question 8

Spectator Ions

Answer 8

Ions that don’t change

Question 9

Water of Crystallisation

Answer 9

Hydrated ionic compounds that contain moles of water within their structure

Question 10

Stoichiometry

Answer 10

The ratio of moles in a chemical reaction

Question 11

Isotope

Answer 11

A variant of a atom with a different amount of neutrons

Question 12

Alkali

Answer 12

A soluble base releasing OH- ions

Question 13

Ionisation Energy

Answer 13

One electron from each atom in a mole of gaseous atoms producing one mole of 1+ gaseous ions

Question 14

Octet

Answer 14

Full outer shell of 8

Question 15

Electron Deficient

Answer 15

Without full shell

Question 16

Expanded Octet

Answer 16

More than 8 electrons in the outer shell

Question 17

Electronegativity

Answer 17

The power of an atom to attract the pair of electrons in a covalent bond

Question 18

London Forces

Answer 18

Electrons moving randomly therefore can be more on one side of a molecule than the other causing an instantaneous dipole which can cause another instantaneous dipole between two separate molecules.

Question 19

Permanent Dipole - Dipole

Answer 19

Only in polar molecules - force of attraction between the permanent dipoles of two molecules.