Question

Who was the first chemist to organize elements by atomic number?

Johann Wolfgang Döbereiner
Antoine Lavoisier
Henry Moseley
John Newlands

Answer 1

The first chemist to organize elements by atomic number was Henry Moseley. He established the modern periodic law, which states that the properties of elements are a periodic function of their atomic numbers, leading to the arrangement of the periodic table by atomic number rather than atomic weight.