Trends In The Periodic Table

Question 1

What happens to the atomic size as you go down a group

Answer 1

Increases

Question 2

Atomic size across a period decreases why?

Answer 2

When moving a long a period electrons are being added to the energy level and protons are being added to the nucleus. The outer electrons are therefore attracted to the and pulled closer to the increasing positive charge

Question 3

Down a group atomic size increases why?

Answer 3

When you move down a group the number of occupied energy levels is increasing

Question 4

What happens to the ionisation energy as you go down a group

Answer 4

It decreases

Question 5

What happens to the ionisation energy as you go across a period

Answer 5

It increases

Question 6

Ionisation energy decreases as you go down a group, why?

Answer 6

The electron to be removed from the outer shell is further away from the nucleus as a result of the increasing size of the atom, this means the attraction for the positive nucleus diminishes. Electrons in the inner energy levels will screen those in the outer energy levels from the nucleus

Question 7

What happens to the atomic size as you go along a period

Answer 7

It decreases

Question 8

Going Along a period the ionisation energy increases,why?

Answer 8

Across a period the nucleus becomes more positive. This makes the outer shell electron more difficult to remove. Also, across a period the atoms become smaller so the outer electron is closer to the nucleus and so is held more tightly.

Question 9

What happens to electronegativity as you go across a period

Answer 9

It increases

Question 10

What happens to electronegativity as you go down a group

Answer 10

It decreases