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Configuratia electronica pt atomii de azot, heliu, clor,argon

Răspuns :

Heliu- (1) 1 e; Clor- (1) 2 e, (2) 8e, (3) 7e; Argon- (1) 2e, (2) 8e,(3) 8e; Azot - (1) 2e,(2) 5e; (1),(2),(3)- straturi