C1 Atomic structure Flashcards
1
Q
who was the first person to put forward ideas about atoms
A
John Dalton
2
Q
what did john dalton say
A
atoms were small spherical substances
they rearranged themselves and convinced during chemical reactions
3
Q
who discovered the electron
A
JJ Thomson
4
Q
who came up with the idea of the plum pudding model
A
JJ thomson, after his discovery of electrons
5
Q
what experiment proved the existence of the nucleus? describe it
A
the alpha particle scattering experiment
alpha particles were fired at a very thin piece of gold foil, particles were scattered instead of going straight through like predicted.
6
Q
what’s an isotope
A
atoms of the same element with different numbers of neutrons
