Alkali metals, Halogens, Noble gases Flashcards Preview

Chemistry | GCSE - Edexcel - Additional (INCOMPLETE) > Alkali metals, Halogens, Noble gases > Flashcards

Flashcards in Alkali metals, Halogens, Noble gases Deck (14)
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1

What group are alkali metals found?

1

2

True or false:
Alkali metals have low melting points compared to other metals.

True.

3

True or false:
Alkali metals are soft.

True.

4

The reactivity increases as you go ___ the group.

Down.

5

What group are halogens found?

7.

6

Name the states and colours of the following elements at room temperature:
Chlorine
Iodine
Bromine
Fluorine

Chlorine - yellow/green gas
Iodine - grey solid
Bromine - brown liquid
Fluorine - pale green gas

7

Halogens need one more electron to gain a full outer shell, so they form ions with a charge of ___.

-1.

8

True or false:
Fluorine is the least reactive halogen and iodine is the most.

False, it's the other way round.

9

True or false:
Halogens are diatomic.

True.

10

When halogens react with hydrogen they form hydrogen halides and when these form ______ when in water.

Acids.

11

When a more reactive halogen reacts with a metal halide what does the more reactive halogen do?

Displace the less reactive one.

12

What group are noble gases found?

0.

13

What makes them inert and why are they called noble/inert?

They are not reactive because they already have a full outer shell.

14

Name 2 uses of noble gases.

Any 2 from: -
- Inside filament lamps instead of air to stop the hot filament reacting with oxygen and burning away.
- Argon can be used in fire extinguishing systems because it's non-flammable.
- Helium has a low density so it's used in balloons and blimps/airships.
- Neon is used in fluorescent lamps and advertising displays as it produces a red light when a current is passed through the tube.