Groups

Question 1

Group 1, reactions between lithium and water

Answer 1

Lithium + water => lithium hydroxide + hydrogen,

fizzing ( gas produced)

Question 2

Group 1, reactions between potassium and water

Answer 2

Potassium + water => flame (purple), metal disappears,
fizzing ( gas produced ), flame

Question 3

General equation for group 1

Answer 3

Metal + water => Metal + Hydrogen
Alkali . Hydroxide . Gas

Question 4

Group 1, similarities between Rb and Cs ( reaction within water )

Answer 4

Flame and exposition

Question 5

Period number

Answer 5

How many shells element has

Question 6

Group number

Answer 6

How many electrons on the outer shell

Question 7

Atomic mass

Answer 7

Protons + Neutrons

Question 8

Group 1, Properties of alkali

Answer 8

• soft metals
• react quickly with water
• lower melting points than typical
• shiny when cut , dull quickly ( because react with oxygen)

Question 9

Group 1, Conduct electricity and heat typical metals and alkali metals?

Answer 9

Yes

Question 10

Diatomic is

Answer 10

goes in pairs

Question 11

Group 1, when metal react with oxygen what produces?

Answer 11

Metal oxide

Question 12

Group 1, test for hydrogen gas

Answer 12

Lit splint gives squeaky pop

Question 13

Group 1, exam q: describe how segmentation is carried out

Answer 13

• water into the tank
• solid full to the bottom of the tank

Question 14

Group 1, exam q: how you would separate pure water from salty water. How you prove it is pure water ?

Answer 14

! Use Distillation
- heat water
- boils at 100 degrees
- evaporates water
- salt left

Question 15

Group 1, symbol for hydroxide

Answer 15

OH

Question 16

Group 1, (fill the gap) the alkali metals get more reactive … the group

Answer 16

Down

Question 17

Group 1, (fill the gap) the outer electron gets … … from the nucleus ( distance )

Answer 17

Further away

Question 18

Group 0, colour at the room temperature

Answer 18

Colourless

Question 19

Group 0, reactive / unreactive ?

Answer 19

Very unreactive

Question 20

Group 0, gases have … … electron shell and … need to gain, loose or share electrons.

Answer 20

Full outer, don’t

Question 21

Group 0, they do / do not react with each other

Answer 21

Don’t, because have full outer shell

Question 22

Group 0, they are …, they exist as individuals atoms, most atoms are …

Answer 22

Monoatomic, diatomic

Question 23

Group 0, density … down the group

Answer 23

Increases

Question 24

Group 0, helium uses

Answer 24

Filling Ballons

Question 25

Group 0, neon uses

Answer 25

Lasers

Question 26

Group 0, argon uses

Answer 26

Lightbulb

Question 27

Group 0, krypton uses

Answer 27

Fluorescent light

Question 28

Group 0, xenon uses

Answer 28

Bright light in lighthouses

Question 29

Group 0, Redon uses

Answer 29

Cancer therapy

Question 30

Group 7, fluorine: colour and state

Answer 30

Yellow, gas

Question 31

Group 7, chlorine: colour and state

Answer 31

Pale green, gas

Question 32

Group 7, bromine: colour and state

Answer 32

Brown, volatile liquid

Question 33

Group 7, iodine:colour and state

Answer 33

Dark grey, solid vapour purple

Question 34

Group 7, all halogens are …

Answer 34

Diatomic

Question 35

Group 7, properties of halogens

Answer 35

- low melting and boiling points ( increases down the group) - poor conductor of heat and electricity - reactivity decreases down the group

Question 36

Group 7, hint to think

Answer 36

- gain or lose - state outer shell - distance - easier / harder to attract to nucleus

Question 37

Group 7, react with metals to form ionic compounds called …

Answer 37

Salts

Question 38

Group 7, react with hydrogen to form hydrogen …

Answer 38

Halides

Question 39

Group 7, uses of halogens (sodium chloride)

Answer 39

Salt

Question 40

Group 7, uses of halogens (sodium fluoride)

Answer 40

Toothpaste

Question 41

Group 7, uses of halogens (sodium bromide)

Answer 41

Disinfectant

Question 42

Group 7, uses of halogens (sodium iodide)

Answer 42

Added to a table salt

Question 43

Displacement reaction =

Answer 43

More reactive displaces a less reactive element from its compound Example = Iron + carbon => Iron + Carbon Oxide. Dioxide

Question 44

Group 7, atoms need to … electrons. If outer shell is closer to nucleus - there is … attraction between nucleus and extra electron, so electron is more … gained

Answer 44

1. Gain 2. Greater 3. Easily

Question 45

Positive = groups: Negative = groups:

Answer 45

Positive = groups: 1,2,3. = metals ( +1, +2, +3) Negative = groups: 5,6,7. = non-metals ( -3,-2,-1)