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Electronic structure and periodicity

Physical foundations · Lesson 3 of 5

Lesson 3 of 5

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Lesson 3 of 5 · Physical foundations

Electronic structure and periodicity

3 quick checks≈2% of the testFoundational

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By the end you’ll be able to

Write and interpret electronic configurations of atoms and ions using the $1s, 2s, 2p, 3s, 3p, 4s$ notation expected at this stage.
Explain the arrangement of elements in the Periodic Table in terms of recurring patterns in electronic structure, including periods and groups.
Define first ionisation energy and represent successive ionisation energies, including the meaning of discontinuities between shells and sub-shells.

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Explain anomalies in first ionisation energy trends, such as those arising from $s$ and $p$ sub-shell differences and electron pairing repulsion.

Apply electronic structure to explain the formation of common ions and the typical charges of elements in the main groups encountered in this unit.

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