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A 20 g sample of Iodine-131 (half-life: 8 days) is left alone. How much remains after 24 days?
2.5 g
Draw the nuclear symbol for an electron.
e (mass number 0, atomic number -1)
Draw the nuclear symbol for an alpha particle.
He (mass number 4, atomic number 2)
Draw the nuclear symbol for a beta particle.
e (mass number 0, atomic number -1) (SAME AS AN ELECTRON)
Draw the nuclear symbol for a gamma ray
Greek gamma symbol (mass number and atomic number of 0)
Strontium-90 has a half-life of 28.8 years. How much of a 64 g sample remains after 57.6 years?
16 g
A 64 g sample of Isotope X decays to 16 g in 10 days. What is the half-life?
5 days
A 1000 g sample of Barium-140 decays to 125 g in 3 days. What is the half-life?
1 day
Iodine-131 decays from 200 g to 25 g. How many half-lives is this?
4
What was the name of the bomb dropped on Nagasaki?
Fat Man
What was the name of the bomb dropped on Hiroshima?
Little Boy
What was the name of the Canadian city in WW1 that was destroyed by the largest non-nuclear explosion?
Halifax
Write the alpha decay of Protactinium-231 (Pa-231)
Should form Actinium-227 (Ac-227)
The sun is powered by what type of nuclear energy?
Fusion
Plutonium-239 (Pu-239) decays, releasing an alpha particle. Write the nuclear equation, and identify what isotope is formed.
Should form Uranium-235 (U-235)
What is the strong force?
The force that holds protons and neutrons together in the nucleus.
