P5 - The Atom And Radioactivity Flashcards
1
Q
Atomic structure
A
Dalton - each element is different atom
JJ Thompson - plum pudding as electrons could be removed
Rutherford and Marsden- alpha particles and foil some deflect
2
Q
Alpha radiation
A
Alpha particle is two neutrons and two protons
Big and slow and don’t travel far
Strongly ionising
3
Q
Beta radiation
A
Fast and small electrons
Moderately ionising
For every electron emitted, a neutron turns into a proton
4
Q
Gamma radiation
A
Long and weakly ionising
Extra energy
5
Q
What blocks alpha
A
Paper
6
Q
What blocks beta
A
Thin aluminium
7
Q
What blocks gamma
A
Thick lead
8
Q
Half life of carbon 14
A
5730 measure proportion can calculate age
1/10000000 ten millionth of the air
9
Q
Fuel that is split in nuclear fusion
A
Uranium 235 or plutonium 239
10
Q
How to control rods help
A
Absorb some neutrons
