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PHYSICS 4: Atomic Structure > Physics 4.2.2 > Flashcards

Physics 4.2.2 Flashcards

1
Q

What happens when an Unstable Nucleus Decays?

A

It Emits Radiation, Called Nuclear Radiation.

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2
Q

What are the Different Types of Radiation? (3)

A

-Alpha.

-Beta.

-Gamma.

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3
Q

What is an Alpha Particle the Same as? Why?

A

Helium Nucleus. They both Consist of 2 Neutrons & 2 Protons.

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4
Q

What is the Charge on Alpha Particles?

A

+2.

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5
Q

What are Beta Particles?

A

Electrons.

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6
Q

What is the Charge on a Beta Particle?

A

-1.

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7
Q

What are Gamma Rays?

A

Electromagnetic Waves.

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8
Q

What type of Electromagnetic Wave has the Highest Energy?

A

Gamma Rays.

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9
Q

What Charge do Gamma Rays have?

A

No Charge.

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10
Q

What is the Range in Air of Alpha Radiation?

A

Few cm.

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11
Q

What is the Range in Air of Beta Radiation?

A

Few 10s of cm.

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12
Q

What is the Range in Air of Gamma Radiation?

A

Infinite.

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13
Q

What is Alpha Radiation Penetrated by?

A

Paper.

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14
Q

What is Beta Radiation Penetrated by?

A

Few mm of Aluminium.

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15
Q

What is Gamma Radiation Penetrated by?

A

Few mm Lead.

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16
Q

What is the Ionisation Power of Alpha Radiation?

A

High.

17
Q

What is the Ionisation Power of Beta Radiation?

A

Medium.

18
Q

What is the Ionisation Power of Gamma Radiation?

A

Low.

19
Q

What happens to an Atom when it is Ionised?

A

The Number of Electrons it has Changes. This gives it a Non-Zero Charge.

20
Q

What is a ‘Non-Zero’ Charge?

A

When an Atom is Ionised, the Number of Electrons it has Changes, giving it a Non-Zero Charge.

21
Q

Why is Alpha Radiation the Most Ionising Radiation?

A

Because it has a Charge of +2.

22
Q

The More Ionising a Form of Radiation, the ___ it will React with the Air it is Moving through.

A

Sooner.

23
Q

___ Ionising Radiation has the Shortest Range in Air.

A

Strongly.

PHYSICS 4: Atomic Structure (29 decks)

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