Topic 10 - Group 2

Question 1

What charged ions do group 2 elements form when they react?

Answer 1

+2

Question 2

Does the atomic radius increase or decrease down group 2?

Answer 2

Increase

Question 3

Why does the atomic radius increase down the group?

Answer 3

More shells

Question 4

Does the first ionization energy increase or decrease down group 2?

Answer 4

Decrease

Question 5

Does the reactivity increase or decrease down group 2?

Answer 5

Increase

Question 6

Why does the 1st ionisation energy decrease down the group?

Answer 6

More shielding because of more shells.

Question 7

What do group 2 elements make when they react with water?

Answer 7

Bases (metal hydroxides.

Question 8

Does the reactivity with water increase or decrease down group 2?

Answer 8

Increase

Question 9

Does Beryllium react with water?

Answer 9

No.

Question 10

How fast does Mg react with cold water?

Answer 10

Slowly

Question 11

What is formed when Mg reacts with steam?

Answer 11

MgO (Magnesium Oxide)

Question 12

What do group 2 elements make when they react with oxygen?

Answer 12

Bases (metal oxides)

Question 13

What color flame does Mg make when it is burnt in oxygen?

Answer 13

Bright white

Question 14

What color and state are group 2 oxides?

Answer 14

White solids

Question 15

What color flame does Ca make when it is burnt in oxygen?

Answer 15

Red

Question 16

What color flame does Ba make when it is burnt in oxygen?

Answer 16

Green

Question 17

When group 2 oxides react with water, is the solution produced acidic or alkaline?

Answer 17

Alkaline

Question 18

Does the solubility of the hydroxides increase or decrease down group 2?

Answer 18

Increase

Question 19

Can group 2 oxides and hydroxides neutralise acids?

Answer 19

Yes

Question 20

What is thermal decomposition?

Answer 20

When a compound breaks apart through heating.

Question 21

What do group 2 carbonates thermally decompose into?

Answer 21

Metal oxides and carbon dioxide

Question 22

What do group 2 nitrates thermally decompose into?

Answer 22

Metal oxides, nitrogen dioxide, and oxygen

Question 23

Do group 2 carbonates/nitrates become more or less thermally stable down the group?

Answer 23

More thermally stable.

Question 24

Why do group 2 carbonates/nitrates become more thermally stable down the group?

Answer 24

There is less distortion between the positive metal ion and the carbonate/nitrate ion. This is because of a lower charge density in the lower group 2 metals.

Question 25

Does the solubility of group 2 carbonates and sulfates increase or decrease down the group?

Answer 25

Decrease

Question 26

What is a use of lime (Ca(OH)2)?

Answer 26

Neutralising acidic soils.

Question 27

What are two uses of limestone (CaCO3)?

Answer 27

Construction material and making cement.