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in Olympiad by (65.3k points)

Some metals impart very bright colours such as red, pink, yellow to the flame when heated. The cause of this phenomenon is the excitation of electrons in the outermost electronic shell.

The electronic configuration in the outermost shell of these metals is represented as

(A) (n - 1) s2p6,ns2p1 

(B) (n - 1) s2p6d10,ns1 

(C) (n - 1) s2p6,ns1 

(D) ns2p6d1

1 Answer

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Correct option: (C) (n - 1) s2p6,ns1 


It is an alkali metal of group-1 of the periodic table.

∴ Configuration is (n -1)s2p6, ns1

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