Question

How did the conect Mandeelev correct the atomic mass if beryllium ?
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Answer 1

Answer:

Correction of atomic masses: Placement of elements in Mendeleev's periodic table helped in correcting the atomic masses of certain elements. For example, the atomic mass of beryllium was corrected from 13.5 to 9. Similarly, atomic masses of indium, gold, platinum Page 3 etc., were also corrected.

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Answer 2

Explanation:

Mendeleev corrected the atomic weights of some elements such as beryllium, indium, gold and platinum. He corrected the atomic weight of beryllium from 13.5 to 9. by using formula atomic weight = equivalent weight × valency.