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ex 7 pls pps pls pls pls pls

Ex 7 Pls Pps Pls Pls Pls Pls class=

Răspuns :

a)z=6

forma :s1(2),s(2)2p(2)2

b)Z=18

forma:s1(2),s2(2)p2(6),s3(2)p3(6)

C)Z=1  

forma: s1(1)    






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