Size & Mass of Atoms (AQA GCSE Chemistry): Flashcards

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Size & Mass of Atoms
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Radius of an atom in nm

0.10.1 nm

Radius of an atom in metres

1×10101 \times 10^{-10} m

Radius of nucleus in metres

1×10141 \times 10^{-14} m

Nucleus radius compared to atom radius

Less than 1/10,0001/10,000 of atom's radius

Relative mass of a proton

11

Relative charge of a proton

+1+1

Relative mass of a neutron

11

Relative charge of a neutron

00

Relative mass of an electron

Very small

Relative charge of an electron

1-1

Location of nearly all the atom's mass

In the nucleus

Proton and electron charge relationship

Equal and opposite

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