Question

Mendeleeff corrected the atomic of​

Answer 1

Answer:

Mendeleev arranged the then known elements in increasing order of their atomic weight and observed the periodicity of properties of elements . Using the concept of valency he calculated atomic mass using the formula atomic mass =  equivalent weight × valency . Thus he changed the atomic weights of Be,In and Os.

hope it helps you

Answer 2

Explanation:

Mendeleev arranged the then known elements in increasing order of their atomic weight and observed the periodicity of properties of elements . Using the concept of valency he calculated atomic mass using the formula atomic mass =  equivalent weight × valency . Thus he changed the atomic weights of Be,In and Os

MARK AS BRAINLIEST ❤