August 2022 1 9 Report
25 БАЛЛОВ!!!
1.Сколько нейтронов в изотопах: 39Ar, 40K, 32S, 63Cu.
2.Определите относительную атомную массу элемента кремния, если он состоит из трех изотопов: 28Si (92?3%), 29Si (4,7%), 30Si (3,0%).
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