Group 2

Question 1

Melting point

Answer 1

Decreases
Weaker metallic bonding
Positive nuclei further away as atoms get bigger
Less attraction between positive ion and delocalised electrons

Question 2

Magnesium reacts _ with cold water

Answer 2

Slowly

Question 3

Mg +2H2O

Answer 3

Mg(OH)2 +H2

Question 4

Magnesium hydroxide is name and power

Answer 4

Milik of magnesia
Neutralise excess stomach acid

Question 5

Magnesium reacts_with steam to from _

Answer 5

Vigorously
MgO
Mg +H20 > Mgo(s) +H2
Ionic
That’s why it’s solid

Question 6

Why is Mgo solid

Answer 6

Ionic

Question 7

Calcium hydroxide is called

Answer 7

Slaked lime

Question 8

Metal + cold water

Answer 8

M + 2h20 > M(oh)2 +H2

Question 9

What is the solubility of Mg(OH)2?

Answer 9

Insoluble.

Question 10

What is the solubility of Ca(OH)2?

Answer 10

Slightly soluble.

Question 11

What is the solubility of Sr(OH)2?

Answer 11

Soluble.
Colourless

Question 12

What is the solubility of Ba(OH)2?

Answer 12

Soluble.(aq) Colourless

Question 13

What is the solubility of Ra(OH)2?

Answer 13

Soluble.(aq)
Colourless

Question 14

What is the solubility of MgSO4?

Answer 14

Soluble. ( aq)
Colourless

Question 15

What is the solubility of CaSO4?

Answer 15

Slightly soluble.(s)
Yt ppt

Question 16

What is the solubility of SrSO4?

Answer 16

Insoluble.(s)
Yt ppt

Question 17

What is the solubility of BaSO4?

Answer 17

Insoluble.(s)
Yt ppt

Question 18

What is the solubility of RaSO4?

Answer 18

Insoluble.(s)
Yt ppt

Question 19

Metal +sulfuric acid

Answer 19

M + SO4² > MSO4