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Radioactive Decay. Nucleus - protons are arranged in -neutrons a pattern. Atoms whose nucleus is to large will emit an alpha particle 4 2 . He.

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radioactive decay

Radioactive Decay

Nucleus - protons are arranged in

-neutrons a pattern

atoms whose nucleus is to large will emit an alpha particle 4 2

Atoms whose nucleus is to large will emit an alpha particle 4 2

He

If the number of neutrons is to high the neutron will convert into a proton and an electron and emit a Beta particle 0

1

slide3

n

  • Neutron proton + electron
some atoms can decay and change into different atoms this is called transmutation
Some atoms can decay and change into different atoms. This is called Transmutation
  • Radioactivity- Aluminum will always be Aluminum and Iron will always be Iron

However

radioactivity is both a sign and a measure of the instability of atoms
Radioactivity is both a sign and a measure of the instability of atoms
  • 1. If the nucleus is unstable 1.

2.

  • 2. The nucleus will emit rays or particles to gain stability.
  • These rays or particles are called Alpha Beta Gamma
particles that decay are called radioactive
Particles that decay are called radioactive
  • 112 elements
  • 270 stable isotopes
  • 2000 unstable isotopes
  • These isotopes want to become stable
  • How?
half life
Half Life
  • The amount of time it takes half of the unstable nuclei of a sample to decay into a more stable nuclei.
half life8
Half life
  • Each radioactive element has an unique half-life and may serve as a fingerprint for identifying radioactive material.
what happens when radiation interacts with living things
What happens when radiation interacts with living things?
  • Depends on the energy of the radiation
electromagnetic spectrum

Electromagnetic Spectrum

Ionizing radiation

Non-ionizing radiation

non ionizing radiation
Non-ionizing Radiation
  • This low energy radiation does not have enough energy to do damage on the molecular level.
  • It does have enough energy to do damage on the cellular level.
  • Example would be Ultra-violet radiation and skin sunburns.
ionizing radiation
Ionizing radiation
  • Highest energy and greatest potential for harm (x-ray, gamma ray, Alpha, beta)
  • This high energy knocks off electrons to create ions.
  • These ions rob electrons from nucleic acids or proteins to become stable.
  • These robbed nucleic acids or proteins become cancer and mutations