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Moseley’s Atomic # Each element contains a unique number of protons. (atomic #) (1 янв 1915 г. – 6 дек 1921 г.)

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6 мес назад

1

0

44

Дата:

1 янв 1915 г.

6 дек 1921 г.

~ 6 years and 11 months

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