group 2 metals

Question 1

what happens to the atomic radius of group 2 metals as you go down the group?

Answer 1

the atomic radius will increase due to the fact that each extra electron shell is further away

Question 2

what happens to ionization energy as you go down group 2

Answer 2

ionization energy will decrease due to the fact that the outer electrons are further away meaning they have a weaker force of attraction to the nucleus

Question 3

what happens to melting point as you go down group 2

Answer 3

the melting point will decrease as you go down group 2 due to the fact that the weak force of attraction between a free electron and nucleus would result in a lower boiling point

Question 4

why does magnesium have an anonymously low melting point in group 2

Answer 4

it has a different crystal structure to the rest of the group

Question 5

how are metal hydroxides formed

Answer 5

when a group 2 metal reacts with water

Question 6

what happens to reactivity as you go down group 2

Answer 6

due to the fact that the outer electrons will be further away from the nucleus of the atom, this weak force of attraction would make the metal more reactive due to the low ionization energy

Question 7

what happens to the solubility of hydroxides as you go down group 2

Answer 7

solubility will increase

Question 8

list the uses of group 2 compounds

Answer 8

calcium hydroxide is used to neutralize soil pH in agriculture
magnesium hydroxide is used in anti-acid tablets to neutralize excess stomach acid

CaO and CaCO3 are used to remove SO2 from flu gas from chimneys and industrial waste
this works because SO2 is acidic

Barium sulfate is used in healthcare to coat organs making them visible on x rays