Question

atomic mass of which elements are changed by Mendeleev??​

Answer 1

Answer:

Hi Dude.... Good Noon.... Good ques.....

Explanation:

BERYLLIUM..........

In one such case he changed the atomic mass of beryllium (Be) from 14, which placed it in Group 15 above nitrogen (N) to 9. This placed it in Group 2 above magnesium (Mg) with which it was more closely related chemically.

The Atomic Mass of BERYLLIUM is changed from 13.5 to 9.0 by MENDELEEV....

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Answer 2

Hello friend, the answer is Beryllium. He changed it's mass from 14 to 9.012.

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