Periodicity

Question 1

Define periodicity

Answer 1

The regular and repeating pattern of various physical or chemical properties. Since the outer electronic configuration of atoms is changing, we therefore expect other properties to change accordingly.

Question 2

What happens moving across the period?

Answer 2

Atomic radius decreases

Question 3

What happens moving down a group?

Answer 3

The atomic radius increases

Question 4

Define ionisation energy

Answer 4

The energy required to convert one mole of isolated gaseous atoms into one mole of single positive charged gaseous ions.