The Halogens

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Slide 1

The Halogens

By Tom

AND

Chris

Slide 2

The Halogens

The halogens are a group of non- metals in the periodic table

They all have seven electrons in their outer shell this makes them all really reactive; they only have to gain one more electron to fill their outer shell.

Unlike Group One the elements get less reactive as you go down the group

Slide 3

Fluorine (F) 2,7

Name: Fluorine Symbol: F Atomic Number: 9 Atomic Mass: 18.998404 amu Melting Point: -219.62 °C

Boiling Point: -188.14 °C Number of Protons/Electrons: 9 Number of Neutrons: 10 Colour: Greenish

Slide 4

Chlorine (Cl) 2,8,7

Name: Chlorine Symbol: Cl Atomic Number: 17 Atomic Mass: 35.4527 amu Melting Point: -100.98 °C

Boiling Point: -34.6 °C

Number of Protons/Electrons: 17 Number of Neutrons: 18

Colour: green

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Bromine (Br) 2,8,18,7

Name: Bromine Symbol: Br Atomic Number: 35 Atomic Mass: 79.904 amu Melting Point: -7.2 °C

Boiling Point: 58.78 °C

Number of Protons/Electrons: 35 Number of Neutrons: 45

Colour: Red

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Iodine (I) 2,8,18,18,7

Name: Iodine Symbol: I Atomic Number: 53 Atomic Mass: 126.90447 amu Melting Point: 113.5 °C

Boiling Point: 184.0 °C

Number of Protons/Electrons: 53 Number of Neutrons: 74

Colour: blackish

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Astatine (At) 2,8,18,32,18,7

Name: Astatine Symbol: At Atomic Number: 85 Atomic Mass: (210.0) amu Melting Point: 302.0 °C

Boiling Point: 337.0 °C

Number of Protons/Electrons: 85 Number of Neutrons: 125 Colour: Unknown

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Uses of Fluorine

The main use of fluorine is toothpaste even though it isn’t as fluorine itself but instead as fluoride, a compound of fluorine.

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Uses of Chlorine

Chlorine is used mostly to kill bacteria or as a bleach. Chlorine bleaches a piece of universal indicator paper white.

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Uses of Bromine

Bromine is one of the main ingredients in camera films (as silver bromide).

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Uses of Iodine