Particles Flashcards
1
Q
Charge of an electron
A
-1.6x10^-19 C
2
Q
Charge of a proton
A
1.6 x 10^-19 C
3
Q
Charge on a neutron
A
0C
4
Q
Mass of proton and neutron
A
1.67 x 10^-27 kg
5
Q
Mass of an electron
A
9.11 x 10^-31
6
Q
Specific charge
A
Charge per unit mass C/kg
7
Q
Speed of light in a vacuum
A
3.0 x 10^8 ms^-1
8
Q
Planck’s Constant
A
6.63 x 10^-34 Js
9
Q
Wave speed equation
A
c=f lambda
10
Q
Photon energy equation
A
E = hf
11
Q
The electron volt eV
A
The work done when one electron is moved through a potential difference of one volt.
1eV = 1.6 x 10^-19 J
12
Q
The strong force is repulsive up to…
A
0.5 fm
13
Q
The strong force is attractive in the range…
A
0.5 fm - 3 fm
14
Q
The strong forces acts to stabilise the nucleus in 2 ways
A
- It provides an attractive force to counter the electrostatic repulsion of the protons.
- As the nucleons get closer together the force becomes repulsive to force them back apart so prevent them from coalescing.
15
Q
Alpha decay
A
A-4
Z-2
Releases an alpha particle
Mono-energetic from a given isotope
