3.2.1 - Periodicity

Question 1

Why does ionisation energy increase across a period?

Answer 1

Greater number of protons, smaller atom
Same shielding
More energy required to break attraction force

Question 2

Ionisation energy across period 3

Answer 2

Increases , except for aluminium (new sub shell evidence) and sulphur (electron repulsion)

Question 3

Explain silicon’s high melting point

Answer 3

Giant covalent structure, lots of energy needed to break covalent bonds