Flashcards
Radioactivity
Cards in this deck (18)
- 1describe the plum pudding modelprotons and electrons are mixed up, the negative electrons are the plums scattered in the positive protons dough
- 2draw the Rutherford model experiment
- 3why use gold in the experiment and why in a vacuum1.it is a pure metal
2.it doesn't collide with other particles - 4what did he findmost particles passed through undetected, a few deflected but still went through and a couple rebounded
- 5what did the results meanstraight through- most of the atom was empty space
deflection- caused by positive charges in the atom
rebound- collided with something much heavier which has a concentrated region of positive charge (nucleus) - 6what does the bohr model of the atom doexplains electrons and orbits
- 7what does the absorption spectrum showelectrons absorb energy from a frequency/colour of light to move to higher energy levels
- 8what does this emission spectrum showelectrons in higher shells are unstable so they return to their original state and give off light. to move to a higher shell electrons absorb energy from the light
- 9what is an isotopeatoms of the same element with the same number of protons but different neutrons, they have the same atomic number but different mass number
- 10what does an alpha particle dowhen a radioactive atom loses one it's mass number decreases by 4 and atomic number by 2
- 11what does a beta minus particle dowhen a radioactive nucleus loses one the mass number stays the same but atomic number increases by one
- 12what does a beta plus particle dowhen a radioactive nucleus loses one the mass number stays the same and the atomic number decreases by one
- 13what does neutron radioactivity dowhen a radioactive particle admits a neutron the mass number stays the same and atomic number decreases by one
- 14what does gamma radiation dowhen a nucleus admits a gamma ray the mass and atomic numbers stay the same
- 15what does ionisation dooccurs when an atom loses or gains an electron
- 16what is alpha radiation made from, how far does it travel and what stops it-helium nucleus
-a few cm
-air, paper - 17what is beta radiation made from, how far does it travel and what stops it-high speed electrons
-a few cm
-3mm thick aluminum - 18what is gamma radiation made from, how far does it travel and what stops it-high energy waves
-a few km
-concrete, lead
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- GCSE Physics Flashcards on Radioactivity, created by sophie christie on 21/02/2020.
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- sophie christie
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