1 Group 1 + 7 Flashcards

1
Q

What are the elements in Group 1 called?

A

Alkali Metals

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2
Q

Why are the alkali metals called the alkali metals?

A

Because they form metal hydroxide solutions (alkali) when they react with water.

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3
Q

How do Group 1 elements react with water?

A

Vigorously

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4
Q

Group 1 metals react with oxygen to form…

A

Metal oxides.

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5
Q

Lithium + oxygen =

A

Lithium oxide.

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6
Q

Sodium + oxygen =

A

Sodium oxide/peroxide

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7
Q

Potassium + oxygen =

A

Potassium peroxide/superoxide

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8
Q

What are the group 1 trends?

A

More reactive going down.

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9
Q

Why are group 1 elements more reactive going down?

A

Lose electrons easier because electrons are further away from nucleus so less attraction so easier to lose.

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10
Q

What are the elements in Group 7 called?

A

Halogens = 7 letters group 7

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11
Q

What is Chlorine?

A

Poisonous green gas.

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12
Q

Describe Bromine.

A

Poisonous red/brown liquid.

Gives off orange vapour at room temp.

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13
Q

Describe Iodine.

A

Dark grey crystalline solid.

Purple Vapour when heated.

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14
Q

What are the physical trends in group 7?

A

Darker, more solid.

Reactivity increase up group

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15
Q

Why does reactivity increase going up group 7?

A

Because short distance between electrons and nucleus so easier to attract new electrons.

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