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Ch 9 Nuclear Radiation
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Slide 1

Ch 9 - Nuclear Radiation

Ch 9 - Nuclear Radiation

Nuclear Emissions

Nuclear Equations

Producing Radioactive Isotopes

Half-Life

Nuclear Fission and Fusion

Uses & Effects

Slide 2

Review

Review

Remember

Protons: + charge

Neutrons: neutral

Electrons: - charge

atomic symbol

atomic number number of protons

mass number number of protons and neutrons

Nuclear Symbols notice mass number is on top

Slide 3

Nuclear Emissions

Nuclear Emissions

Radiation comes from the nucleus of an atom.

Unstable nucleus emits a particle or energy  alpha

 beta

 gamma

non-radioactive particle = neutron

Slide 4

Alpha Particle

Alpha Particle

Same as a helium nucleus

(He)

4

2 He or 

Two protons

Two neutrons

Slide 5

Beta Particle 

Beta Particle 

An electron emitted from the nucleus

0

e or 

1

A neutron in the nucleus breaks down

1 1 0

n H + e

0 1 -1

Slide 6

Gamma  Radiation

Gamma  Radiation

Pure radiation

Like an X-ray but comes from the nucleus

Slide 7

Radiation Protection

Radiation Protection

Shielding

alpha paper, clothing

beta lab coat, gloves

gamma- lead, thick concrete

Limit time exposed

Keep distance from source

Slide 8

Radiation Protection

Radiation Protection

Slide 9

Nuclear Equations

Nuclear Equations

In the reactants and products

Atomic numbers must balance

and

Mass numbers must balance

Slide 10

Alpha decay

Alpha decay

Slide 11

Beta decay

Beta decay

234Th 234Pa + 0e

90 91 1

beta particle

Slide 12

Gamma radiation

Gamma radiation

No change in atomic or mass number

11B 11B + 0 

5 5 0

boron atom in a

high-energy state

Slide 13

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