Henri Becquerel noticed invisible 'rays' turned his photographic plates dark. Which element did he study that did this?
Which element did Marie Curie discover?
What does radium do in the dark?
Who discovered polonium?
Marie and Pierre Curie
What did Marie Curie name the invisible rays that were emitted by some materials?
The radiation given off by radioactive materials can be one fo 3 types. Name these types.
What does emit mean?
What is an alpha particle?
The nucelus (protons and neutrons) of a helium atom
What is a beta particle?
What is gamma radiation?
a wave from the electromagnetic spectrum
Which type of radiation is the most dangerous?
What happens to radioactive elements over time?
They give off less radiation
What do we call the time it takes an element to give off half as much radiation per second?
What are the benefits of radioactive materials?
Medical scanners (checking for cancers)
Destroying tumours (radiotherapy)
Sterilising medical instruments
What are the negative aspects of radiactive substances?
They cause cancer
They can cause random mutations in DNA