Periodic Table

Question 1

what did John Dalton say about the atom?

Answer 1

at the start of the 19th century, he described atoms as solid spheres and said that different spheres represented different elements

Question 2

what did JJ Thompson say about the atom?

Answer 2

in 1897, Thompson concluded that atoms were not solid spheres but they were very small and contained negatively charged particles (electrons). His plum pudding model stated the atom was positive with electrons embedded into it

Question 3

what was Rutherford’s experiment?

Answer 3

alpha particle scattering experiment in 1909. he fired alpha particles at a gold sheet