Chapter 7 - Periodicity

Question 1

Periodicity

Answer 1

Repeating patterns/trends (of physical or chemical properties/reactions)

Question 2

Metallic radius

Answer 2

Half of the experimentally determined distance between the nuclei of nearest neighbours in the solid

Question 3

Covalent radius (of a non metallic element)

Answer 3

Half of the experimentally determined distance between nuclei of the nearest neighbour in the solid

Question 4

Nuclear pull

Answer 4

The attraction of the positive nuclear charge of the electrons

Question 5

Electron sheilding

Answer 5

The repulsion of electrons by inner shells of electrons

Question 6

1st Ionisation energy

Answer 6

Energy required to remove one electron from the ground state of each atom in a mole of gaseous atoms of that element

Question 7

2nd Ionisation energy

Answer 7

Energy required to remove one electron from a 1+ Ion of each atom in a mole of gaseous ions of that element

Question 8

Metallic bond

Answer 8

The electrostatic attraction between positive ions (cations) and delocalised electrons

Question 9

Delocalised electrons

Answer 9

Bonding electrons that are not fixed between two atoms but are instead mobile