Ответ:
Са: р=20, е=20, n=20
Fe: p=26, e=26, n=30
Cu: p=29, e=29, n=35
Click: p=17, e=17, n=18
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Ответ:
Са: р=20, е=20, n=20
Fe: p=26, e=26, n=30
Cu: p=29, e=29, n=35
Click: p=17, e=17, n=18