RADIOACTIVICTY AND NUCLEAR ENERGY Flashcards Preview

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Flashcards in RADIOACTIVICTY AND NUCLEAR ENERGY Deck (6)
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1

what happens to most positively charged alpha particles directed at thin gold foil?

they pass straight through

2

What happens if the alpha particle is traveling near the nucleus?

it's path will be deflected

3

what does Rutherford scattering experiment tell us?

-inside the atom there must be a small positively charged nuclei
-the nucleus must be small since few alpha particles are deflected
-it must be positive to repel positively charged alpha particles

4

at which point does an alpha particle that is deflected by 180 stop from the nucleus?

when it's electrical potential energy = it's initial kinetic energy

5

What is the most accurate method of getting a picture of a crystals atomic structure and why?

electron diffraction, because electrons are leptons and therefore do not interact through the strong nuclear force

6

What happens if a beam of high energy electrons is directed onto a thin film of material in front of a screen?

a diffraction pattern will appear on the screen