AS-Level Chemistry: Electrons in atoms Part 1
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alevelalevelchemistryaslevelchemistryshellsshellsubshellssubshellorbitalsorbitalspdfshapesshapeperiodictableionisationionizationenergyenergiesfirstsecond1staqaocrcie2ndsphericaldumbelllobeselectronicconfigurationprinciplequantumnumberprincipalgroupsperiodsnuclearchargeatomicradiusshieldingfillingcopperchromiumexceptionsexception