Halogens

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Created by: jodi
Created on: 09-01-19 15:51

What is the appearance of fluorine at room temperature?

Yellow gas

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What is the appearance of chlorine at room temperature?

Yellow-green gas

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What is the appearance of bromine at room temperature?

Red-brown liquid

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What is the appearance of iodine at room temperature?

Grey-black solid

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Do the halogens dissolve in water?

Yes; except for fluorine which reacts violently with water

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What colour is chlorine in water?

Pale green.

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What colour is Bromine in water?

Orange.

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What colour is iodine in water?

Yellow/Brown

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What colour is chlorine in hexane?

Colourless.

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What colour is bromine in hexane?

Red.

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What colour is iodine in hexane?

Purple

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Why do the electronegativiy values of the halogens decrease going down the group?

The larger the atom, the more the nucleus is shielded by the extra inner electrons. As a result, the effect of nuclear charge is reduced so the ability for the nucleus to attract electrons is also reduced.

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Why do the b.p.s of the halogens increase going down the group?

Halogen molecules are non-polar therefore the only forces of attraction between molecules are VDWs in which the strength of these increase with larger molecules. i.e more electrons.

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Other cards in this set

Card 2

Front

What is the appearance of chlorine at room temperature?

Back

Yellow-green gas

Card 3

Front

What is the appearance of bromine at room temperature?

Back

Card 4

Front

What is the appearance of iodine at room temperature?

Back

Card 5

Front

Do the halogens dissolve in water?

Back

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Halogens