Deck 3

Question 1

First ionisation energy

Answer 1

The first ionisation energy of an element is 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

Electron shielding

Answer 2

Electron shielding is the repulsion between electrons in different inner shells. Shielding reduces the net attractive force from the positive nucleus on the outer-shell electrons.

Question 3

Successive ionisation energies

Answer 3

Successive ionisation energies are a measure of the energy required to remove each electron in turn.

Question 4

Second ionisation energy

Answer 4

The second ionisation energy of an element is the energy required to remove one electron from each ion in one mole of gaseous 1+ ions to form one mole of gaseous 2+ ions.

Question 5

A shell

Answer 5

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

Question 6

Principal quantum number

Answer 6

Principal quantum number,n, is a number representing the relative overall energy of each orbital, which increases with distance from the nucleus.

Question 7

A sub-shell

Answer 7

A sub-shell is a group of the same type of atomic orbitals(s,p,d or f) within a shell.

Question 8

Electron configuration

Answer 8

An electron configuration is the arrangement of electrons in an atom.

Question 9

A compound

Answer 9

A compound is a substance formed from two or more chemically bonded elements in a fixed, usually shown by a chemical formula.

Question 10

An ionic bond

Answer 10

An ionic bond is the electrostatic attraction between oppositely charged ions.

Question 11

A giant ionic lattice

Answer 11

A giant ionic lattice is a three-dimensional structure of oppositely charged ions, held together by strong ionic bonds.

Question 12

A group

Answer 12

A group is 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 13

A covalent bond

Answer 13

A covalent bond is a bond formed by a shared pair of electrons.

Question 14

A lone pair

Answer 14

A lone pair is an outer-shell pair of electrons that is not involved in chemical bonding.

Question 15

A dative covalent bond or coordinate bond

Answer 15

A dative covalent bond or coordinate bond is a shared pair of electrons which has been provided by one of the bonding atoms only.

Question 16

An atomic orbital

Answer 16

An atomic orbital is a region within an, atom that can hold up to two electrons with opposite spins.