All about Isotopes
What element is this isotope?
3717Cl
Chlorine
Why do isotopes decay?
To become stable!
What is the half life?
It is the time it takes for a sample to decay by 50%
When two nuclei merge together, this is the process called what?
Fusion
What are the 3 types of decay particles?
Alpha, beta, gamma
What is the mass of Chlorine-37?
Mass = 37
42He is which type of decay particle?
Alpha
How many half lives have gone by for 25% of the sample to remain?
2 half lives
What nuclear process is occurring inside nuclear reactors?
Fission.
What are isotopes?
When you have the same element but different masses.
What is the mass and atomic number of this isotope?
168O
Mass - 16, Atomic Number - 8
Which particle has the lightest mass?
a) 42He b) 11H c) 0-1e d) 10n
c) 0-1e
What should a half life graph look like?
A curve downward
What do nuclear bombs rely on to create their explosiveness?
What are the clouds that come out of nuclear reactors made of? Are they safe or radioactive?
They are NOT radioactive - it's just boiled water (steam!)
Which shows a proper pair of isotopes?
Oxygen-16/Chlorine-35
Oxygen-16/Oxygen-18
Oxygen-18/Chlorine-35
Oxygen-16/Oxygen-18
Which of the materials will block Beta particles?
a) Paper b) Aluminum Foil c) Concrete d) Lead
B,C, and D
Fossils contain Carbon-14, a radioisotope with a half life of a few million years. What can you determine about the fossil using the half life of this element?
The age of the fossil and when it died.
Which is more energetic: Fusion or fission?
Fusion - it gives about 4x more energy than fission.
Which type of decay is this?
6027Co -> 0-1e + 6028Ni
Beta Decay (0-1e)
How many neutrons does an isotope of Oxygen-18 have?
10 neutrons
What element is commonly used in nuclear reactors? (Remember the simulation we did!)
Uranium-235
If you start with 100 grams of Uranium-235, how much is left after 3 half lives?
12.5 grams
What is the result of fusion reactions in the Sun? (What elements are used and what are produced?)
Hydrogen is used up to make Helium and Energy in our Sun.
As the Sun ages and dies, what will happen to the hydrogen and helium inside?
Hydrogen will decrease as it is used up while helium is produced and increases.