Physics 4.2.1 Flashcards

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1
Q

Why are some Atomic Nuclei Unstable?

A

Because of an Imbalance in the Forces within the Nucleus. Forces exist between the Particles in the Nucleus.

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2
Q

Which is Unstable: Carbon-12, or Carbon-14? Why?

A

The Isotope Carbon-14 has 2 extra Neutrons, so it is Unstable.

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3
Q

What can Unstable Nuclei do to become more Stable?

A

Emit Radiation.

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4
Q

What can Radiation be in the Form of? (2)

A

-High Energy Particle

-High Energy Wave.

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5
Q

As the Radiation Moves Away from the Nucleus, it takes some Energy with it. What does this do to the Nucleus?

A

This Reduces the Overall Energy of the Nucleus, therefore making it more Stable.

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6
Q

What is ‘Radioactive Decay’?

A

The Process of Emitting Radiation .

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7
Q

Radioactive Decay is a ___ Process.

A

Random.

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8
Q

What do you call Objects that Contain Radioactive Nuclei?

A

Sources of Radiation.

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9
Q

What is the ‘Radioactive Activity’ of a Radioactive Source?

A

The Rate at which the Unstable Nuclei from a Source of Radiation Decays.

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10
Q

Wat is Radioactive Activity Measured in?

A

Becquerels, Bq.

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11
Q

What Equipment is Used to Detect Radiation?

A

Geiger-Muller Tube.

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