Chemistry Topic 1// History of an atom Flashcards
1
Q
What did John Dalton say about atoms
A
He described atoms as solid spheres and said that different spheres made up the different elements
2
Q
What did JJ Thompson conclude from his experiments
A
That atoms werent solid spheres. His measurements of charge and mass showed that an atom must contain even smaller negatively charged particles - electrons
3
Q
What was the solid sphere idea changed to
A
Plum pudding model
4
Q
What dis the plum pudding model show
A
showed the atom as a ball of positive charge with electrons stuck in it
5
Q
A
