Radioisotopes
An isotope with an unstable nucleus
A radioisotope
The half life of a radioisotope is _____________
a) half the time taken for complete decay
b) half the time taken for half the decay
c) time taken for complete decay
d) time taken for half the decay
d) time taken for half the decay
An alpha particle is actually a nucleus of what?
Helium
What determines the identity of a chemical element?
A game where you can mine and craft.
(Hint: It's not minecraft)
Terraria
Is carbon-14 naturally occurring or human-made?
Naturally occuring
Radioisotope A has a half-life of 2 hours, while radioisotope B has a half-life of 10 hours. Which decays faster?
Radioisotope A
Which type of radiation consists of high-energy electromagnetic waves?
Gamma radiation
What is the mass number of an atom with 6 protons and 8 neutrons?
14
This is a distress signal, what is it saying?
/.../---/.../
SOS
Which radioisotope is commonly used in medical imaging: Technetium-99m or Americium-241?
technetium-99m
A sample contains 100 radioactive atoms. How many remain after one half-life, on average?
50
Which type of radiation consists of energetic electrons or positrons?
Beta radiation
Which of the following is radioactive?
a) hydrogen sulfide
b) vimentin
c) tritium
d) deuterium
c) tritium
What do you see when the screen goes black?
Your own reflection, duh!
Which of these is a naturally occurring radioisotope?
a) Plutonium-239
b) Technetium-99m
c) Iodine-131
d) None of these!
None of these!
A radioactive sample contains 200 atoms and has a half-life of 5 years. How many atoms remain after 15 years, on average?
25 atoms.
Which generally has the greatest penetrating ability: alpha, beta, or gamma radiation?
Gamma
Isotopes have the same number of protons.
a) True
b) False
a) True
"If a man has sexual relations with an animal, he must be put to death, and you must kill the animal"
Leviticus 20:15 NIV
Do all radioisotopes have the same half-life?
No
The mass of a radioactive element whose half-life is 15 years is represented here by y. After t years, the mass (in grams) is given by y = 10(1/2)t/15
a) What is the original mass when t = 0?
b) How much of the original mass is present after 60 years?
a) 10 grams
b) Approx. 0.625 grams
Which type of radiation can be stopped by a sheet of paper under ordinary conditions: alpha, beta, or gamma?
Alpha
Which of the following emitted particles consists of two protons?
a) alpha
b) beta
c) gamma
d) zeta
a) alpha
Integral of 7x dx
7/2 x2 + C