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GCSE CHEM 2 (Atomic Structure (Protons (+) Electrons(-)…
GCSE CHEM 2
Atomic Structure
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Here is a diagram showing an atom of Lithium
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Atoms have no charge, The number of protons in the nucleus is always the same as the number of electrons (in shells)
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Ion has uneven number of protons and electrons This happens when an electron is lost Or when an electron is gained The proton number does not change.
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Protons and neutrons have similar mass. Electrons have no mass, or extremely little amount.
Atomic Number Number on the bottom which means the number of protons or electrons (The number increases across the periodic table)
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