The periodic table and group 2

Question 1

how do group 1 and 2 metals react?

Answer 1

they react by loosing their outer shell electrons

Question 2

what is the trend going down group 1 and 2?

Answer 2

going down both group 1 and 2 the elements get more reactive, this is because it becomes easier for the atoms to lose their outer shell electrons because more shells, electrons further from nucleus

Question 3

describe the reactions of group 2 with oxygen

Answer 3

all group 2 elements react with oxygen to form the metal oxide.

Question 4

describe the reactions of group 2 with water

Answer 4

element + water => hydroxide + hydrogen gas
observations: bubbles of gas, gets more vigorous going down the group

Question 5

describe the effect of heat on group 2 carbonates

Answer 5

group 2 carbonates decompose when heated, giving the solid metal oxide and carbon dioxide gas (thermal decomposition)
observations: none really as begin and end with a white solid

Question 6

describe the experiment which shows that the thermal stability of group 2 carbonates increases down the group

Answer 6

• heat each group 2 carbonate passing the gas produced through limewater
• time how long it takes the limewater to turn cloudy
• the least thermally stable will turn the limewater cloudy first

Question 7

how can you make the experiment for thermal stability fair?

Answer 7

• same amount of G2 carbonate
• same vol/conc of limewater
• same heating conditions

Question 8

why does MgCO3 react first?

Answer 8

MgCO3 turns limewater cloudy first, Mg2+ is more charge dense than Ca2+ so polarises the carbonate more, so less energy needed

Question 9

hy\ca/ts

Answer 9

hy= solubility of G2 hydroxides, inc. down the group
ca= solubility of G2 carbonates, dec. down the group
ts= thermal stability of G2, inc. down group