Radioactivity Flashcards
What is the charge of the proton
Positive
Name the three types of Radioactive decay
Alpha
Beta
Gamma
Penetration of a Gamma particle
2-3 feet of lead
What is the Charge of a alpha particle
+ 2 e
What was the name of the first model on the atom
Plum pudding
What is the nature of a Alpha particle
2 Protons and 2 neutrons
Ionisation of a Gamma particle
Low
What is the Diameter of an Atom
I X 1O -10
What is the nature of a Gamma particle
High frequency wave
no mass
Define irradiation
Irradiation is where an object is exposed to nuclear radiation.
The exposure can originate from various sources
eg Natural background or natural resources
What is the charge of the electron
Negative
What is the ionisation of a alpha particle
High ability to remove electrons form other atoms
What do we use Gamma for today
Gamma radiation is used in the treatment of cancer, testing equipment and sterilising medical instruments.
What is the nature of a Beta particle
1 electron
What are the side effects of contamination on the human body
Damages cells
cancer
cell death
Nucleus damage
What is the charge of a Beta particle
-1e
How do you work out the number of protons
Total number of protons
Danger of Gamma
low
What is the penetration of a alpha particle
2-3 cm of air
or
1 sheet of paper
Charge of a Gamma particle
No charge
What is the charge of the Nucleus
Neutral
What do we use Beta radiation for today
Medical imagery ( X-RAY)
What is the penetration of a Beta
2-3mm of Aluminium
What is Half-Life
Half life is the time taken for the activity of a sample or the number of undecayed nuclei to halve
