physics cards :) Flashcards
1
Q
relative mass and relative charge of a proton?
A
relative mass: 1
relative charge: +1
2
Q
Relative mass and charge of a neutron?
A
Relative mass:1
Relative charge: 0
3
Q
Electron
A
Relative mass: 1860
Relative charge:-1
4
Q
radius of an atom?
A
1x10-10m
5
Q
what is an isotope?
A
atoms of the same element with the same number of protons and different number of neutrons
6
Q
Irradiation definition?
A
exposing an object of ionising radiation
7
Q
contamination
A
unwanted materials containing radioactive atoms
8
Q
fusion
A
joining of the nuclei to form a heavier nucleus
9
Q
fission
A
splitting of a large unstable nucleus
10
Q
alpha particles
A
made from two protons and two neutrons
11
Q
beta
A
high speed electrons from nucleus. blocked by aluminium foil
12
Q
Ion
A
An element that has lost or gained an electron
