Who was The first chemist to organize elements by atomic number
O Johann Wolfgang Döbereiner
Antoine Lavoisier
Henry Moseley
O John Newlands

Henry Moseley

Explanation:

The above answer is incorrect because he was not the person who sorted the peroidic table by Atomic Number.

C. Henry Moseley

Explanation:

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.