2.5- Radioactive Substances Flashcards
1
Q
What are radioactive substances?
A
Substances that constantly give out radiation from their nuclei
2
Q
4 things that cause/ have caused background radiation
A
> rocks
cosmic rays from space
nuclear weapon tests
nuclear accidents
3
Q
Alpha particle consists of…
A
2 protons and 2 neutrons (helium)
4
Q
Beta particle consists of…
A
An electron
5
Q
Alpha and beta radiations are deflected by… (2)
A
> electric fields
>magnetic fields
6
Q
Half life definition
A
Time taken for half its radioactive atoms to decay
