1. Physics Revision-CHAPTER 4-Atomic Structure
How did each of these scientists contribute to our understanding of the structure of the atom?
JJ Thompson
Rutherford
Bohr
What is radioactivity?
What is background radiation, give two sources?
What is the activity of a radioisotope?
What is meant by irradiation?
Describe radioactive decay:
𝛼 emissions:
𝛽 emissions:
𝛾 emissions:
Properties of radiation:
Penetrating power
Deflection by magnetic field
Deflection by electric field
Alpha radiation (𝛼)
Beta radiation (𝛽)
Gamma radiation (𝛾)
Explain what half-life is:
Fill in this table below:
Number of half-lives 1 2 3 4 5 6
No. of decayed
nuclei
1000
No, of decayed
KEY WORDS:
Alpha radiation (𝛼)
Beta radiation (𝛽)
Gamma radiation (𝛾)
Atomic number
Isotope
Mass number
Half-life
ASSESSMENT: