Where are the electrons located in an atom?
Electrons are found in shells (or 'energy levels'), and orbit the nucleus.
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What do we mean by the ‘electronic structure’ or ‘electronic configuration’ of an atom?
‘Electronic structure’ or ‘electronic configuration’ refers to the arrangement of electrons within an atom, i.e. how many electrons are in each shell.
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How many electrons are found in the first, second, and third shells of an atom?
1st shell: 2 electrons 2nd shell: 8 electrons 3rd shell: 8 electrons
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If an atom has 15 electrons in total, how many will it have in each shell?
2 in the first shell
8 in the second shell
5 in the third shell
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What is meant by an atoms ‘outer shell’?
The 'outer shell' is the shell of electrons that is furthest from the nucleus.
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