7.2 Alpha particle scattering Flashcards
1
Q
How dense is the material of the nucleus
A
10^16kgm-3
2
Q
Briefly describe the alpha scattering experiment
A
Alpha particles were fired at a thin sheet of gold. Most of them passed through undeflected, some were deflected through small angles. A tiny fraction of them were deflected by more than 90 degrees
3
Q
What did ernest rutherford conclude from this experiment
A
He concluded that the atom is mostly empty space with a positive nucleus in the centre, with some electrons in the empty space
4
Q
What did rutherford also roughly calculate
A
the diameter of the nucleus
5
Q
later, what did rutherford also conclude about alpha particles
A
When alpha particles gain electrons, they emit a spectrum exactly like helium
