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Flashcards in Radioactivity Deck (31)
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1

What is the charge of the proton

Positive

2

Name the three types of Radioactive decay

Alpha
Beta
Gamma

3

Penetration of a Gamma particle

2-3 feet of lead

4

What is the Charge of a alpha particle

+ 2 e

5

What was the name of the first model on the atom

Plum pudding

6

What is the nature of a Alpha particle

2 Protons and 2 neutrons

7

Ionisation of a Gamma particle

Low

8

What is the Diameter of an Atom

I X 1O -10

9

What is the nature of a Gamma particle

High frequency wave

no mass

10

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

11

What is the charge of the electron

Negative

12

What is the ionisation of a alpha particle

High ability to remove electrons form other atoms

13

What do we use Gamma for today

Gamma radiation is used in the treatment of cancer, testing equipment and sterilising medical instruments.

14

What is the nature of a Beta particle

1 electron

15

What are the side effects of contamination on the human body

Damages cells
cancer
cell death
Nucleus damage

16

What is the charge of a Beta particle

-1e

17

How do you work out the number of protons

Total number of protons

18

Danger of Gamma

low

19

What is the penetration of a alpha particle

2-3 cm of air
or
1 sheet of paper

20

Charge of a Gamma particle

No charge

21

What is the charge of the Nucleus

Neutral

22

What do we use Beta radiation for today

Medical imagery ( X-RAY)

23

What is the penetration of a Beta

2-3mm of Aluminium

24

What is Half-Life

Half life is the time taken for the activity of a sample or the number of undecayed nuclei to halve

25

What do we use Alpha Radiation for today

Smoke detectors

26

What is the danger of a Alpha particle

High

27

What is the danger of Beta

medium

28

How do you work out the Nucleon number

neutron + proton

29

What is contamination

contamination is the unwanted presence of materials containing radioactive atoms.
they can be on surfaces or with solids , liquids and gases including the human body and skin

30

Define Radioactivity

The admission of a small particle or bit of energy from an unstable nucleus