Question

Which of the following was discovered first?

A. the electron

B. the neutron

C. the proton

D. the periodic table

E. atomic number

Answer 1

Is A the correct answer?

Answer 2

what do u think abt periodic table

Answer 3

I am not sure ...:(

Answer 4

its said that periodic table was established before the electrons were discovered and even before the coordination compounds were known

Answer 5

so D is the correct answer?

Answer 6

noo its discovered after discovery of protons electron and neutron LOL :)

Answer 7

Sorry, I am confused now...

Answer 8

LO me to confused :) LOL but i will go with periodic table

Answer 9

Thanks!