Exam Q 13 Flashcards
What are alpha particles?
They are positively charged particles. They consist of groups of two protons and two neutrons put together
Describe J J Thomson’s plum pudding model of the atom
Label diagram with electrons embedded on a positve atom
Explain why some alpha particles were deflected at large angles as they passed through the gold foil
They were repelled when passing near to the nucleus of the gold atom that is of positive charge like the alpha particles
Why were some alpha particles reflected back along their original paths?
Why did this only happen to a small number of alpha particles?
Some: As they collided with the positive nucleus of the atom
Small: were reflected as the nucleus is very small and dense. Most of the atom is empty space.
Draw a labelled diagram to show the new structure of the atom proposed by Rutherford
Label the nucleus and the electron shell/cloud
a small coloured in circle with a large ring around it is sufficient as long as it is labelled corectly.
