Unit 3 iii) Nuclear Chemistry Flashcards
1
Q
Where does background radiation come from?
A
- soil and rocks in the ground
- the air around us
- plants
- animals
- cosmic rays from space
2
Q
what are the 3 type of radiation?
A
Alpha, Beta, Gamma
3
Q
properties of alpha?
A
Consists of: He nucleus
Charge: 2+
4
Q
properties of beta?
A
Consists of : electron
Charge : 1-
5
Q
what material stops alpha?
A
paper
6
Q
what material stops beta?
A
aluminium
7
Q
what material stops gamma?
A
lead
8
Q
What is nuclear chemistry?
A
Nuclear Chemistry is the study of radioactive substances.
9
Q
What is a half life?
A
Half-Life is the time taken for the mass or activity of a radioisotope to decay/decrease by HALF.
10
Q
what is the equation to calculate half life
A
half-life =
number of half lives
11
Q
Name a use of Radioisotopes
A
Medical- Co-60 is used to treat cancerous tumours
12
Q
What is an isotope?
A
Atoms with the same atomic number but a different mass number
