Definitions

Question 0

Successive ionisation energies

Answer 0

A measure of the energy required to remove each electron in turn from each atom in one me mole of gaseous atoms

Question 1

First ionisation energy

Answer 1

The energy required to remove one electron from each atom in one mole of gaseous atoms to form one mole of gaseous 1+ ions

Question 2

A shell

Answer 2

A group of atomic orbitals with the same principal quantum number, n. Also know as a main energy level

Question 3

Principal quantum number, n

Answer 3

A number representing relative overall energy of each orbital, increasing with distance from the nucleus. The sets of orbitals with the same n-value are referred to as energy levels.

Question 4

Atomic orbital

Answer 4

A region within an atom that can hold up to two electrons with opposite spins

Question 5

Subshell

Answer 5

A group of the same type of atomic orbitals (s. P. D or f) within a shell

Question 6

Electron configuration

Answer 6

The arrangement of electrons in an atom

Question 7

Electron shielding

Answer 7

The repulsion between electrons indifferent inner shells, reducing the net attractive force from the positive nucleus on the outer shell electrons

Question 8

Ionic bond

Answer 8

The electrostatic attraction between oppositely charged ions.

Question 9

Giant ionic lattice

Answer 9

Is a three-dimensional structure of oppositely charged ions, held together by strong ionic bonds

Question 10

Group

Answer 10

A vertical column in the periodic table. Elements in the same group have similar chemical properties and their atoms have the same number of outer-shell electrons.

Question 11

Covalent bond

Answer 11

A bond formed by a shared pair of electrons

Question 12

Lone pair

Answer 12

An outer-shell pair of electrons that isn’t involved in chemical bonding.

Question 13

Dative covalent/ coordinate bond

Answer 13

A shared pair of electrons which has been provided by one of the bonding atoms only