Size & Mass of Atoms (OCR GCSE Chemistry A (Gateway Science Suite)): Quizzes

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Size & Mass of Atoms
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What is the approximate radius of an atom in metres?

1×10101 \times 10^{-10} m

What is the approximate radius of an atom in nanometres?

0.1 nm

What is the approximate radius of the nucleus?

1×10141 \times 10^{-14} m

How does the radius of the nucleus compare to the radius of the atom?

Less than 1/10,000

Which has the largest radius?

Human hair

What is the relative mass of a proton?

1

What is the relative charge of a neutron?

0

What is the relative mass of an electron?

Very small

What is the relative charge of an electron?

-1

Where is nearly all of the atom's mass concentrated?

In the nucleus

Which subatomic particles are found in the nucleus?

Protons and neutrons

How do the charges of protons and electrons compare?

Equal and opposite

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