IONISATION ENERGY

Question 1

What is ionisation energy?

Answer 1

Minimum energy needed for one mole of electrons to move from one mole of atoms in a gaseous state

Question 2

What 3 factors affect IE?

Answer 2

Distance of electrons from the nucleus
attraction of the nucleus
Shielding of the attraction of the nucleus

Question 3

Ionisation energy along a period?

Answer 3

First IE increases due to decreasing atomic radius
greater electrostatic forces of attraction

Question 4

ionisation energy down a group?

Answer 4

First IE decreases due to increasing atomic radius & shielding

Question 5

What does shielding do?

Answer 5

Reduces the effect of electrostatic forces of attraction

Question 6

What is successive ionisation energy?

Answer 6

More electrons being removed from an ion that’s becoming increasingly positive

Question 7

Why are sussessive ionisation energies always higher?

Answer 7

When the first electron is removed, a positive ion is formed

-The ion increases the attraction on the remaining electrons so the energy required to move the next electron is larger

Question 8

What are electrostatic forces of attraction?

Answer 8

non-contact attractive or repulsive forces
(push and pull objects without touching it)