GCSE Chemistry - C1

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Describe the properties of a proton
Relative Mass - 1, Charge - +1
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Describe the properties of a neutron
Relative Mass - 1, Charge - 0
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Describe the properties of an electron
Relative Mass - 0, Charge - -1
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What does the atomic number tell you?
The number of protons (and electrons)
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What does the mass number tell you?
The number of protons and neutrons added together.
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Formula for Relative Atomic Mass
Ar = [(%xMass)+(%xMass)] / 100
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Why do you draw the baseline of chromatography in pencil?
Because pencil is insoluble whereas ink would dissolve.
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What is the end result of the chromatography practical called?
A Chromatogram
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How do you know an ink is pure?
There will be only one spot on the paper.
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What are the properties of group 1 metals?
1. Very reactive. 2.Lower melting and boiling points as you go down.
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What charge do group 1 ions have?
+1
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What are the properties of group 7 elements?
As you go down: 1. Become less reactive. 2. Higher melting and boiling points.
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What charge do group 7 ions have?
-1
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What are the properties of group 0 elements?
1. Very unreactive (full outer shell) 2. All are colourless gases at room temperature.
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Why do the boiling points of the group 0 elements increase as you move down the group?
The increase in boiling points is due to an increase in the number of electrons in each atom leading to greater intermolecular forces between them which need to be overcome.
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Card 2

Front

Describe the properties of a neutron

Back

Relative Mass - 1, Charge - 0

Card 3

Front

Describe the properties of an electron

Back

Preview of the front of card 3

Card 4

Front

What does the atomic number tell you?

Back

Preview of the front of card 4

Card 5

Front

What does the mass number tell you?

Back

Preview of the front of card 5
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