Atom And Radiation Flashcards
What’s the relative charge of a proton
+1
What’s the relative charge of a neutron
0
What’s the relative charge of an electron
-1
The the mass of a proton
1
What’s the mass of the nuetron
1
What’s the mass of the electron
Small
What’s an isotope
Same elements with a different number of nuetrons
What radiation/radioactivity comes out of the nucleus
Gamma
Alpha
Beta
How do we measure the radiation coming out of the nucleus
Through geiger Muller tube
What type of background radiation is man-made used for
Air travel
Nuclear reactions
Nuclear weapons
Medical- X-rays
What type of back ground radiation is Rocks/ ground used for
Building Materials
Where does background Radiation come from?
Environment
What did Rutherford and Mersdon thought?
That electrons were stuck to the nucleus
How did Rutherford and mersdon test plum pudding
- set up in a vacuum chamber (no air)
- source of Alpha Particles = 2+
- Very thin gold foil
Detector moves checking the particles
Most went straight through
Some were deflected
What did Rutherford and Mersdon found in plum pudding
Most went straight through
Some came back
What was the conclusion about the plum pudding
Most atoms were empty
The positive centre was dense
What the new evidence about plum pudding
Replaced if changed the theory
What is alpha made up
2 protons
2 neutrons
What’s the charge of an Alpha
2+
What’s the mass of an Alpha
4
What’s Beta made up of
Electrons
What’s the relative charge of beta
-1
What’s the reletive mass of beta
Small
What’s gamma made of?
Electro magnetic wave
