November 2021 1 5 Report
Электронную формулу 1s во 2 степени 2s во 2 степени 2p в 6 степени 3s во 2 степени 3p в 6 степени имеют: 1)К в нулевой, 2) Al в 3+, 3) S в 2-, 4) Ar в нулевой
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