The Modern Periodic Table

Question 1

What was the big change from the old to new periodic table?

Answer 1

Electrons, protons and neutrons were discovered and the periodic table became arranged in order of atomic number.

Question 2

What was the initial reaction from other scientists to the idea of a periodic table?

Answer 2

They didn’t believe it had any real use, but they soon realised that it was good to predict the properties of elements