Radioactive ElementsFoundation Science 4 Class Code SC22102
RadioactivityRadioactive decay – when the nucleus of an atom gives off energy orparticles.        Three types of decay:   ...
RadioactivityRadioactive decay – when the nucleus of an atom gives off particles.       Three types of decay:             ...
RadioactivityRadioactive decay – when the nucleus of an atom gives off particles.       Three types of decay:             ...
So, Radiation can be energy              or a particleIs bottom or top alpha decay? Beta decay? Gamma decay?              ...
DifferencesThin material can stop most alpha (α) and beta (β) decay.Gamma (γ) decay can only be stopped by thick metals su...
DifferencesThin material can stop most alpha (α) and beta (β) decay.Gamma (γ) decay can only be stopped by thick metals su...
Radioactive Elements have  large atomic numbers The more protons, the more unstable the atoms tend to be                  ...
IsotopesIsotopes of an element have the same number of protons,but different numbers of neutrons.So, helium (He) has 2 pro...
Isotopes
Symbols for Radioactivity   Radioactive Material Present
Geiger CountersGeiger countersmeasure radiation                       When alpha, beta or                       gamma radi...
Geiger Counter How stuff works geiger video
Answer in Notebook1. What are the three kinds of radioactive decay?2. What kind of decay can only be stopped by a heavy me...
Upcoming SlideShare
Loading in …5
×

Radioactive elements 4

1,164 views

Published on

Published in: Education
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
1,164
On SlideShare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
51
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

Radioactive elements 4

  1. 1. Radioactive ElementsFoundation Science 4 Class Code SC22102
  2. 2. RadioactivityRadioactive decay – when the nucleus of an atom gives off energy orparticles. Three types of decay: 1) Alpha (α) decay – gives off protons and neutrons Particles Nucleus of an atom
  3. 3. RadioactivityRadioactive decay – when the nucleus of an atom gives off particles. Three types of decay: 1) Alpha (α) decay – gives off protons and neutrons 2) Beta (β) decay – gives off an electron
  4. 4. RadioactivityRadioactive decay – when the nucleus of an atom gives off particles. Three types of decay: 1) Alpha (α) decay – gives off protons and neutrons 2) Beta (β) decay – gives off an electron 3) Gamma (γ) decay – gives off electromagnetic waves
  5. 5. So, Radiation can be energy or a particleIs bottom or top alpha decay? Beta decay? Gamma decay? Gamma (γ) decay Alpha (α) decay Beta (β) decay
  6. 6. DifferencesThin material can stop most alpha (α) and beta (β) decay.Gamma (γ) decay can only be stopped by thick metals suchas lead
  7. 7. DifferencesThin material can stop most alpha (α) and beta (β) decay.Gamma (γ) decay can only be stopped by thick metals suchas lead
  8. 8. Radioactive Elements have large atomic numbers The more protons, the more unstable the atoms tend to be Atomic numbers above 83 are radioactive
  9. 9. IsotopesIsotopes of an element have the same number of protons,but different numbers of neutrons.So, helium (He) has 2 protons . Isotopes of Helium all have2 protons and 4 or 6 neutrons.Some isotopes are unstable, and radioactive.
  10. 10. Isotopes
  11. 11. Symbols for Radioactivity Radioactive Material Present
  12. 12. Geiger CountersGeiger countersmeasure radiation When alpha, beta or gamma radiation hits the sensor, it “clicks”
  13. 13. Geiger Counter How stuff works geiger video
  14. 14. Answer in Notebook1. What are the three kinds of radioactive decay?2. What kind of decay can only be stopped by a heavy metal like lead (Pb)?3. What kind of decay gives off electrons?4. What is the only type of decay that gives off energy, and not particles?5. What is used to measure if the radiation level somewhere is safe for humans?6. In your own words, what is an isotope?7. What kind of radiation is this??8. Why do you think lead (Pb) is so good at stopping radiation?

×