P2.5 Radioactivity Flashcards by natalie king

Q

What’s irradiated?

A

Hit by radiation

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Q

What’s is contamination?

A

Radioactive thing on or in you

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Q

What is radiation?

A

From nucleus
Random
Can’t be stopped

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Q

What’s background radiation?

A

Food
Air
Ground
Space

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Q

What’s alpha?

A

4A2

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Q

What’s beta?

A

An electron

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Q

What’s gamma?

A

Electromagnetic wave

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Q

Uses of alpha?

A

Smoke detectors

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Q

Uses of beta?

A

Carbon dating

Material thickness

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Q

Uses of gamma?

A

Tracers

Kill cells

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Q

Which is most ionising?

A

Alpha

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Q

What is radiation detected?

A

With a Geiger counter

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Q

What causes danger?

A

DES

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Q

What does radiation do in a magnetic field?

A

Gamma nothing
Beta bends right lots
Alpha bends left a bit

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Q

What did Rutherford prove?

A

The nucleus is positive

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Q

What’s a half life?

A

Time taken for half of the atoms to decay

Q

Uses of half life?

A

Rock decay
Carbon dating
Injections

Q

What are isotopes?

A

Different neutron number

Spoke are unstable