Ionisation Energy

Question 1

What is ionisation energy?

Answer 1

The Energy required to remove 1 mole of electrons from 1 mole of gaseous atoms from its outermost shell.

Question 2

What is the “equation” for the first ionisation energy?

Answer 2

X(g) —> X^+(g) + e-
(The second X is +1 charge)

Question 3

What is second ionisation energy?

Answer 3

The second ionisation energy is the energy required to remove the second electron

Question 4

For factors that affect the ionisation energy, how does the distance from the nucleus / or just atomic radius affect ionisation energy?

Answer 4

Smaller atoms have higher ionisation energy as there’s stronger attraction between the nucleus and outer electrons. (Ionisation energy decreases down the group)!

Question 5

For factors affecting ionisation energy, how does nuclear charge affect ionisation energy?

Answer 5

More protons= stronger attraction.
(Across a period, ionisation energy increases)!

Question 6

When referring to factors that affect ionisation energy, how does shielding affect ionisation energy?

Answer 6

Larger atoms have more shielding - this increases when you go up a shell!