Răspuns:
Ca Z=20 A=40
20e, 20p, 20 n
b) K L M N 2 8 8 2
1s2 2s2 2p6 3s2 3p6 4s2
K=2e L=8e M=8e N=2e
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Răspuns:
Ca Z=20 A=40
20e, 20p, 20 n
b) K L M N 2 8 8 2
1s2 2s2 2p6 3s2 3p6 4s2
K=2e L=8e M=8e N=2e