AQA · Chemistry · 8462
GCSE Chemistry: Relative electrical charges of subatomic particles
Atomic structure and the periodic table · AQA GCSE Chemistry (8462), specification point 4.1.1.4. Cards are generated from the exam board's own specification for "Relative electrical charges of subatomic particles", and every card links back to the page it came from. Specification © AQA — used with attribution.
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What is the relative electrical charge of a proton?
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+1.
What is the relative electrical charge of a neutron?
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0 — neutrons are neutral.
What is the relative electrical charge of an electron?
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−1.
Why does an atom have no overall electrical charge?
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It has equal numbers of protons (+1) and electrons (−1), so the charges cancel out.
In an atom, the number of electrons is equal to the number of ? in the nucleus.
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protons
What is the atomic number of an element?
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The number of protons in the nucleus of one of its atoms.
Which subatomic particle count differs between atoms of different elements?
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The number of protons — each element has its own unique proton number (atomic number).
Where are the protons located in an atom?
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In the nucleus at the centre of the atom.
In the nuclear model of the atom, where are the electrons found?
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Outside the nucleus, arranged around it (in energy levels / shells).
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