3.1.1.1 Particles

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Chemistry

A-Level Chemistry

AQA

Physical Chemistry

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12 Terms

1
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atomic number

number of protons

2
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atomic mass

number of protons and electrons

3
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relative isotopic mass

mass of an isotope relative to 1/12th a carbon-12 atom

4
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isotope

an atom with the same number of protons and electrons but a different number of neutrons

5
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relative atomic mass

mass of an atom relative to 1/12th a carbon-12 atom

6
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relative molecular mass

sum of all the molecules relative atomic masses in a compound

7
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what is the charge of an electron

-1

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what is the charge of a proton

+1

9
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what is the charge of a neutron

0

10
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what is the mass of an electron

1/2000

11
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what is the mass of a proton

1

12
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what is the mass of a neutron

1