Chemistry- The history of the atom (year 9) Flashcards
1
Q
What happened at the start of the 19th Century?
A
John Dalton described atoms as solid spheres. He said that different spheres are made up of the different elements
2
Q
What did JJ Thompson conclude in 1897?
A
that atoms were not solid spheres
3
Q
What did the plum pudding model show?
A
It showed the atom as a ball of positive charge with electrons stuck in it
4
Q
What did Earnst Rutherford do?
A
He conducted the famous alpha particle scattering experiments
5
Q
What did Rutherford come up with?
A
He came up with an idea to explain his new evidence- the nuclear model of the atom
