Question

How did mendeleaf corrected the atomic weight of beryllium as 9 ?

Answer 1

● According to the location in the periodic table,

●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.

Answer 2

Mendeleve corrected the atomic weight of Beryllium by correcting its valency.

Explanation:

• Mendeleve is known as the father of modern periodic table.

• Mendeleeve corrected many of the elements position in the periodic table.

• Those elements were beryllium, indium, gold and platinum.

• In place of the atomic mass, he gave more importance to atomic number for the periodic table.

• Atomic weight of the element is calculated on the basis of product of equivalent mass of the element and its valency.

• As the valency of Beryllium was considered as 3,it's atomic weight came to 13.5.

• He corrected it to 9 and placed it in right place.

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