periodic table

Question 1

What are alkali metal properties

Answer 1

Soft and low melting points

Question 2

What is group 1 called

Answer 2

Alkali metals

Question 3

Why is group 1 very reactive

Answer 3

It’s really easy to lose their electron

Question 4

What happens in a reaction with sodium and water

Answer 4

Fizz furiously and melt in the heat of the reaction

Question 5

What does a reaction with alkali metal and water produce

Answer 5

Hydrogen gas and hydroxide of the metal

Question 6

What happens in a reaction with lithium and water

Answer 6

Fizz furiously

Question 7

What happens in a reaction with potassium and water

Answer 7

Fizz violently, melt in the heat of the reaction, ignites the hydrogen gas

Question 8

What happens with reactivity of group 1 as you go down the group

Answer 8

Reactivity increases

Question 9

Word equation for reaction between sodium and water

Answer 9

2Na + 2H2O - 2NaOH + H2

Question 10

What is the colour and physical state of chlorine

Answer 10

Green gas

Question 11

What is the colour and physical state of bromine

Answer 11

Red brown liquid which gives off orange vapour at room temperature

Question 12

What is the colour and physical state of iodine

Answer 12

Dark grey solid which gives a purple vapour when heated

Question 13

How can you test for predict properties of halogens

Answer 13

Melting point increases and colours of the halogens get darker down the group

Question 14

What is group 7 called

Answer 14

Halogens

Question 15

What is the chemical test for chlorine

Answer 15

Hold a piece of damp blue litmus paper
Chlorine will bleach the paper and turn it white may also turn red

Question 16

How does reactivity decrease down the group in group 7

Answer 16

Harder to attract the extra electron to fill the outer shell when it’s further away from the nucleus

Question 17

What do hydrogen and halogens form

Answer 17

Hydrogen halides

Question 18

What are hydrogen halides (property)

Answer 18

Soluble - dissolve in water to form acidic solutions

Question 19

What are halogen displacement reactions

Answer 19

Redox reactions

Question 20

What is oxidised and what is reduced in a halogen displacement reaction

Answer 20

Halogens gain electrons (reduced)
Halide ions lose electrons (oxideation)

Question 21

What happens when you have potassium chloride solution with chlorine water

Answer 21

No reaction

Question 22

What happens when you have potassium bromide solution with chlorine water

Answer 22

Orange solution formed

Question 23

What happens when you have potassium iodide solution with chlorine water

Answer 23

Brown solution formed

Question 24

What happens when you have potassium chloride solution with bromine water

Answer 24

No reaction

Question 25

What happens when you have potassium bromide solution with bromine water

Answer 25

No reaction

Question 26

What happens when you have potassium iodide solution with bromine water

Answer 26

Brown solution formed

Question 27

What happens when you have potassium chloride/ potassium bromide/ potassium iodide solution with iodine water

Answer 27

No reaction

Question 28

A student added a few drops of a halogen solution to a potassium iodide solution. The solution turned brown. Explain what the student should do to help him identify the halogen solution.

Answer 28

He should add a few drops of the solution to a bromine salt solution. If the solution turns orange, the halogen solution contains chlorine. If there is no reaction, the halogen solution contains bromine.

Question 29

What are noble gases inert

Answer 29

Full outer shell

Question 30

What is group 0 called

Answer 30

Noble gases

Question 31

What can argon (group 1) be used for

Answer 31

- filament lamps because it’s not flammable/ stops the very hot filament lamp from burning away

Question 32

What can argon and helium be used for

Answer 32

Protect metals that are being welded - the inner atmosphere stops the hot metal reacting with oxygen

Question 33

What can helium be used for?

Answer 33

In airships and party balloons. Helium has a lower density than air.- makes balloons float. It is also non-flammable which makes it safer to use and hydrogen gas.

Question 34

What increases as you go down group 0?

Answer 34

Boiling point, melting point and density

Question 35

Use the densities of helium (0.2kg m) and argon (1.8kg m) to predict the density of mass

Answer 35

(0.2 + 1.8) / 2 = 2.0 / 2 =1.0

Question 36

The melting point of the first four noble gases are Helium = -272°C Neon = -249°C Argon = -189°C Krypton = -157°C Predict the melting point of xenon

Answer 36

Any melting point between -150°C and 80°C