Question

In the first periodic table, the atomic mass of was rectified to 9.4
please answer​

Answer 1

Answer:

Mendeleev's periodic table helped in correcting the atomic masses of some of the elements, based on their positions in the periodic table. For example, the atomic mass of beryllium was corrected from 13.5 to 9.0.

Answer 2

Answer:

Mendeleev's periodic table helped in correcting the atomic masses of some of the elements, based on their positions in the periodic table. For example, the atomic mass of beryllium was corrected from 13.5 to 9.0.

Explanation:

so the answer will be no. b Beryllium