(BLUE) Gp 1/2 Metals

Question 1

Describe the trend down the go 1/2 group

For ionising energy

Gp2

Answer 1

Lower ionising energy which means less energy to react

Question 2

Which group is more reactive and why

Pg 2

Answer 2

Gp1

Lower ionising energy
Less protons than group two
Larger atomic radius

Question 3

Use your understanding of of electron structure to explain why there is a partially large increase between the 2nd and 3rd ionising energy of Mg

Pg4

Answer 3

The electrostatic attraction is now stronger on the electrons because there is one less electron sharing the electro static attraction force

Question 4

Use your understanding of ionising energy to explain why beryllium chloride is a covalent compound while barium chloride is ionic

Pg4

Answer 4

It takes too much energy to ionise beryllium so it is easier to share electrons , barium loses electrons easier therefore can form a ionic compound

Question 5

Which is more reactive Mg or Ba ? Explain your answer
Pg4

Answer 5

They have both the same electrons in there outer shell however barium has a lower ionising energy therefore con form more ionic bonds

Question 6

From your understanding of metallic bonding state with an explanation which gp 2 element from magnesium to barium has the highest melting point

Pg 4

Answer 6

Magnesium as it is smaller but it has the same charge , this means that the charge density will be greater.

Question 7

Metal + water ——>

Answer 7

Hydroxide + hydrogen

Question 8

Magnesium reacts with water very slowly to produce
Pg 6

Answer 8

Magnesium hydroxide and hydrogen

Question 9

Magnesium reacts with steam and hot water to produce what

Pg6

Answer 9

Magnesium oxide and hydrogen

Question 10

Describe the reactivity down or up gp2 with cold water

Pg 6

Answer 10

The reactivity decreases as you go up the gp2 metals with Mg not being very reactive

Question 11

CaO + H2O —->

Answer 11

Ca(OH)2

Question 12

Acid + base ——>

Answer 12

Salt + water

Question 13

Oxide + water ——>

Answer 13

Hydroxide

Question 14

Oxide + acid ——>

Answer 14

Salt + water

Question 15

How does solubility decreases or increase down or up a group2 with a solution if sulphate ions or solution of hydroxide ions

Pg8

Answer 15

Solution of sulphate ions : becomes less soluble down the group

Hydroxide ion solution : increases solubility down the group

Question 16

Explain the thermostat ability of ions of gp1 and 2 down the group and why

Pg9

Answer 16

The higher the charge density the more it can polarise carbonate ions . So the bigger the ion gets the less polarising it becomes and the less it reacts , and therefore the less it will destabilise the anion

Question 17

How do you test for CO2

Answer 17

Lime water

Question 18

Gp2 nitrates decompose _________
Pg14

Answer 18

Fully
To:
Oxide
Nitrogen dioxide
Oxygen

E.g

Ba(NO3) —-> BaO + 2NO2 + 0.5O2

Question 19

Gp1 nitrates decompose ______

Answer 19

Decompose partially
To nitrate (III) + oxygen

Eg

NaNO3 ——> NaNO2 + 0.5O2

Question 20

How does lithium nitrate decompose

Answer 20

2LiNO3 —-> li2O + 2NO2 +0.5O2

Question 21

What is the wire in a flame test and what do you dip it in before hand

Answer 21

HCl

Nicrome wire

Question 22

Flame test colour :

Lithium

Answer 22

Red

Question 23

Flame test colour :
Sodium

Answer 23

Yellow / orange

Question 24

Flame test colour :
Potassium

Answer 24

Lilac

Question 25

Flame test colour :
Rubidium

Answer 25

Violet

Question 26

Flame test colour :
Caesium

Answer 26

Violet

Question 27

Flame test colour : Mg

Answer 27

Colourless

Question 28

Flame test colour :
Calcium

Answer 28

Yellow-red

Question 29

Flame test colour :
Strontium

Answer 29

Red

Question 30

Flame test colour :
Barium

Answer 30

Pale green