P7- atoms and radiation Flashcards
1
Q
What is a radioactive substance?
A
Radioactive substances areatoms that decay naturally.
2
Q
What are the types of radiation that can be given out?
A
Alpha, beta and gamma
3
Q
When does a radioactive substance emit radiation?
A
Radioactive decay is random.
4
Q
How was radiation discovered?
A
Henry Becquerel in 1896. Radioactive sample caused images on photographic film.
