Atomic structure: elements 1 - 20 and beyondPresentation Transcript
Atomic Structure and electron configuration Elements 1 to 20 and beyond..
Hydrogen Electron configuration: 1 H
Helium Electron configuration: 2 He
Lithium 2, 1 Li
Beryllium 2, 2 Be
Boron 2, 3 B
Carbon 2, 4 C
Nitrogen 2, 5 N
Oxygen 2, 6 O
Fluorine 2, 7 O
Neon 2, 8 O
Sodium 2, 8, 1 Na
Potassium 2, 8, 8, 1 K
Beyond calcium.. Not in syllabus Electron shell filling follows different rules. Knowledge of electron configuration and drawing of atomic structure NOT required (and do NOT assume!)
Beyond calcium.. All you need to know: For atoms of all elements in Group I to VII, number of outermost electrons = group number. All atoms of Group 0 elements have 8 outermost electrons, except helium atom, which has 2. Transition metals – not required to know.
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