3.2.1 Periodicity

Question 1

Periodicity definition

Answer 1

REPEATING trends along a period

Question 2

Atomic radius trend along a period

Answer 2

Decreases along the period as proton number increases, nuclear charge increases and shielding remains similar, so electrons are held closer to the nucleus

Question 3

Electronegativity trend along a period

Answer 3

Increases along the period as atomic radius decreases, meaning it is much harder to accept a lone pair of electrons

Question 4

Ionisation energy trend along a period

Answer 4

Generally decreases along the period as smaller atomic radius means it is harder to lose their outer electron as they are more strongly attracted