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Radioactivity and Nuclear Reactions
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Contents

Contents

Section 1 Radioactivity slides 3-31

Section 2 Nuclear Decay slides 32-55

Section 3 Detecting Radioactivity slides 56-74

Section 4 Nuclear Reactions slides 75-106

Slide 2

Radioactivity

Radioactivity

What Youll Learn

What particles make up an atom and its nucleus

How the nucleus is held together

What radioactivity is

The properties of radioactive and stable nuclei

Slide 3

The Nucleus

The Nucleus

The atom is made up of protons, neutrons and electrons.

Slide 4

The Nucleus

The Nucleus

The atom is made up of protons, neutrons and electrons.

Positively-charged protons and electrically neutral neutrons are located in the nucleus.

Slide 5

The Nucleus

The Nucleus

The atom is made up of protons, neutrons and electrons.

Positively-charged protons and electrically neutral neutrons are located in the nucleus.

Each proton has one positive charge or +1 so each nucleus has a positive charge equal to the number of protons that it has.

Slide 6

The Nucleus

The Nucleus

The number of protons is called the elements atomic number.

Slide 7

The Nucleus

The Nucleus

The number of protons is called the elements atomic number.

Atoms contain the same number of protons as negatively-charged electrons.

Slide 8

The Nucleus

The Nucleus

The number of protons is called the elements atomic number.

Atoms contain the same number of protons as negatively-charged electrons.

The electric attraction of opposites pulls the electrons close to the nucleus.

Slide 9

Is the nucleus the largest part of an atom?

Is the nucleus the largest part of an atom?

Protons and neutrons are packed together tightly so that the nucleus takes up only a tiny part of an atom.

Slide 10

Is the nucleus the largest part of an atom?

Is the nucleus the largest part of an atom?

Protons and neutrons are packed together tightly so that the nucleus takes up only a tiny part of an atom.

If an atom were the size of a football stadium, its nucleus would be the size of a marble!

Slide 11

Is the nucleus the largest part of an atom?

Is the nucleus the largest part of an atom?

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