2.2 Modern Understanding Of The Atom (GCSE Chemistry)

The following is a GCSE Chemistry test covering '2.2 Modern Understanding Of The Atom'

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In a neutral atom, how does the number of electrons compare to the number of protons?

What subatomic particle revolves outside the nucleus?

What subatomic particle has a positive charge?

What subatomic particles make up most of an atom`s volume?

The electron carries a charge of:

An isotope varies in the number of which particle?

An atom of lithium has 3 protons. How many electrons does a neutral lithium atom have?

What particle has almost no mass compared to protons and neutrons?

What particle causes an atom to become negatively charged?

What is the relative mass of a neutron?

When electrons gain energy they can:

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