Periodicity

Question 1

What are group sevens also called

Answer 1

Halogens

Question 2

How does melting and boiling point change down group seven

Answer 2

Increase

Question 3

How does reactivity change down group seven

Answer 3

Decrease

Question 4

How do the states of group seven atoms change down the group

Answer 4

It goes g g l s s due to intermolecular forces increasing because electron numbers are increasing

Question 5

How does reactivity change down group 1

Answer 5

It increases

Question 6

How does melting and boiling point change down group 1

Answer 6

Decrease

Question 7

What are group one elements also called

Answer 7

Alkali metals

Question 8

Why does the reactivity increase down group 1

Answer 8

-size of atom increases
- attraction between nucleus and outer electrons decreases
-more inner shells=increased shielding of outer electrons
-easier to loose outer electron

Question 9

Why does reactivity decrease down group seven

Answer 9

-size of atom increases
-attraction between nucleus and outer electrons decreases
- more inner shells = increased shielding of outer electrons
-harder to gain outer electron

Question 10

What are the properties of transition metals

Answer 10

• high density
  -low reactivity
  -Hugh melting and boiling points
• high conductivity
  -form coloured compounds

Question 11

What are properties of group one elements

Answer 11

Opposite to transition metals