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Write the electronic configuration of alkali metals 2Li, 11Na, 19K, 37Rb, 55Cs and 87Fr.

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Write the electronic configuration of alkali metals 2Li, 11Na, 19K, 37Rb, 55Cs and 87Fr.

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Alkali metals  Atomic number Compleate electronic configuration
Li 3 2,1
Na 11 2.8,1
K 19 2,8,8,1
Rb 37 2,8,18,8,1
Cs 55 2,8,18,18,8,1
Fr 87 2,8,18,32,18,8,1
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