Period Table Trends

Question 1

What is Atomic Radius?

Answer 1

The distance between the centre of an atom’s nucleus and its outermost electron shell. Down a group increases, across a period decreases.

Question 2

What is First Ionisation Energy?

Answer 2

The energy required to remove on mole of electrons from one mole of atoms in the gaseous state. Down a group decreases, across a period increases.

Question 3

What is Electronegativity?

Answer 3

A measure of an atoms ability to attract a pair of bonding electrons. Down group decreases, across a period increases.