Ответ:
Объяснение:
Ar(He) = 4
Ar(Be) = 9
Ar(Al) = 27 27+9+4 = 40
Ar(H) = 1
Ar(Li)=7
Ar(S) = 32 32+7+1 = 40
Ar(C) = 12
Ar(Mg) = 24 24+4+12 = 40
Ar(F) = 19
Ar(Ne) = 20 20+19+1 = 40
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Ответ:
Объяснение:
Ar(He) = 4
Ar(Be) = 9
Ar(Al) = 27 27+9+4 = 40
Ar(H) = 1
Ar(Li)=7
Ar(S) = 32 32+7+1 = 40
Ar(C) = 12
Ar(He) = 4
Ar(Mg) = 24 24+4+12 = 40
Ar(H) = 1
Ar(F) = 19
Ar(Ne) = 20 20+19+1 = 40