PT

Question 1

Sketch a graph and explain the shape to show how atomic radius changes across period 3

Answer 1

(Graph:downward sloping gradually except Ar (higher than Na)

Across period, NC increases
SE remains approx constant since electrons are added to the same shell
ENC increases
There are stronger Efoa b/w nucleus and ve
AR decreases

Question 2

Sketch a graph and explain the shape to show how ionic radius changes across period 3