Unit 1: Periodicity

Question 1

Trend of covalent radius going across period

Answer 1

Decrease - increasing/stronger nuclear charge

Question 2

Trend of covalent radius going down group

Answer 2

Increase - more electron energy shells, outer electron shell shielded from pull of nucleus

Question 3

Ionic radius trend going across period

Answer 3

Decrease - negative ions larger than parent atom

Question 4

Ionic radius trend going down group

Answer 4

Increase

Question 5

Ionisation energy trend across period

Answer 5

Increase - stronger nuclear charge

Question 6

Ionisation energy trend down group

Answer 6

Decrease

Question 7

Electronegativity trend across period

Answer 7

Increase - stronger nuclear charge (more attraction between bonds)

Question 8

Electronegativity trend down group

Answer 8

Decrease