Periodic Trends

Question 1

Ionization Enegry

Answer 1

increasing right across
Decreasing down

• because as you go down electrons in the outermost layer are increasingly farther away from the positivity charged nucleus and therefore held less tightly.
• because as you go to the right the electrons in the outermost level experience a greater nuclear charge.

Using energy to release elections

Question 2

Electron affinity

Answer 2

group 1A - more positive as you go down

more negative as you go right across the periodic table

releasing energy to gain

wants electrons

Question 3

electronegativity

Answer 3

Increasing to the right
increasing up

F>O>N>Cl>Br>C>S>I>P>H

Question 4

Atomic Radius

Answer 4

decreasing across

increasing down