• a very small number of alpha particles were deflected backwards from the gold foil.
Use the nuclear model to explain this experimental result.
1. Most alpha particles went straight through - atoms are mostly empty space
2. some deflected at small angle - the alpha particle repelled from the nucleus
3. some deflected straight back - same as above but even rarer because it had to hit the nucleus straight unlike the one above to come straight back whereas that one could hit the side and repel
hope this helps