Groups In The Periodic Table Flashcards

1
Q

What group are the alkali metals?

A

1

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2
Q

What happens to the melting points of the alkali metals as you go down the group?

A

They decrease

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3
Q

What happens to the reactivity as you go down the alkali metals?

A

Reactivity increases

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4
Q

What are 2 properties of alkali metals?

A

Low melting and boiling points

Very soft

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5
Q

What do alkali metals form?

A

Ionic compounds

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6
Q

Alkali metal + water…

A

—> metal hydroxide + hydrogen

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7
Q

What happens to lithium in water? (3)

A

Moves around the surface

Fizzes

Dissolves

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8
Q

What happens to sodium and potassium in water? (3)

A

Move around surface

Fizz

Melt

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9
Q

What happens to potassium in water?

A

It glows

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10
Q

What group are the halogens?

A

7

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11
Q

What happens to the melting point of halogens as you go down the group?

A

They increase

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12
Q

What happens to the reactivity of the halogens as you go down the group?

A

It decreases

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13
Q

What is chlorine like at room temperature?

A

Pale green gas

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14
Q

What is bromine like at room temperature?

A

Red/brown liquid

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15
Q

What is iodine like at room temperature?

A

Dark grey solid

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16
Q

Halogen+hydrogen…

A

—> hydrogen halide

17
Q

What group are the noble gases?

18
Q

What are the 4 properties of noble gases?

A

Colourless
Low melting and boiling points
Poor conductors
Non flammable

19
Q

What is helium used for?

20
Q

Why is helium used for balloons? (2)

A

Lower density than air

Non flammable

21
Q

What is neon used for?

22
Q

What is argon used for?

A

Filament lamps

23
Q

What is krypton used for?

A

Photography

24
Q

What does inert mean?

A

Don’t react easily with anything

25
Noble gases are I....
Inert
26
What decreases down the group of noble gases? (3)
Melting point Boiling point Density
27
Why do noble gases exist as single atoms?
Because they don’t form bonds easily with other atoms