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Physics > Radioactivity > Flashcards

Radioactivity Flashcards

1
Q

What is the charge of the proton

A

Positive

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2
Q

Name the three types of Radioactive decay

A

Alpha
Beta
Gamma

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3
Q

Penetration of a Gamma particle

A

2-3 feet of lead

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4
Q

What is the Charge of a alpha particle

A

+ 2 e

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5
Q

What was the name of the first model on the atom

A

Plum pudding

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6
Q

What is the nature of a Alpha particle

A

2 Protons and 2 neutrons

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7
Q

Ionisation of a Gamma particle

A

Low

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8
Q

What is the Diameter of an Atom

A

I X 1O -10

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9
Q

What is the nature of a Gamma particle

A

High frequency wave

no mass

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10
Q

Define irradiation

A

Irradiation is where an object is exposed to nuclear radiation.
The exposure can originate from various sources
eg Natural background or natural resources

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11
Q

What is the charge of the electron

A

Negative

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12
Q

What is the ionisation of a alpha particle

A

High ability to remove electrons form other atoms

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13
Q

What do we use Gamma for today

A

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

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14
Q

What is the nature of a Beta particle

A

1 electron

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15
Q

What are the side effects of contamination on the human body

A

Damages cells
cancer
cell death
Nucleus damage

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16
Q

What is the charge of a Beta particle

A

-1e

17
Q

How do you work out the number of protons

A

Total number of protons

18
Q

Danger of Gamma

A

low

19
Q

What is the penetration of a alpha particle

A

2-3 cm of air
or
1 sheet of paper

20
Q

Charge of a Gamma particle

A

No charge

21
Q

What is the charge of the Nucleus

A

Neutral

22
Q

What do we use Beta radiation for today

A

Medical imagery ( X-RAY)

23
Q

What is the penetration of a Beta

A

2-3mm of Aluminium

24
Q

What is Half-Life

A

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

25
Q

What do we use Alpha Radiation for today

A

Smoke detectors

26
Q

What is the danger of a Alpha particle

A

High

27
Q

What is the danger of Beta

A

medium

28
Q

How do you work out the Nucleon number

A

neutron + proton

29
Q

What is contamination

A

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
Q

Define Radioactivity

A

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

31
Q

What is the Ionisation of a Beta particle

A

Medium

Physics (9 decks)

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