Nuclear Decay
Energy associated with changes in the nucleus of the atom.
Nuclear Reaction
The half life is the amount of time it takes for a substance to...
Decay by half.
We expect to see volcanoes at which boundary type?
Convergent
Galium metal turns from solid to liquid at room temperature. What type of energy would be associated with this change? Phase, chemical or nuclear?
Phase
Mrs. Fitz is explaining the process of beta decay to Mrs. Perry. She says that Uranium (element 92) decays into the element Protactinium (element 91). Is this correct?
No, It should gain a proton and change into element 93 (Neptunium)
The atomic mass of the reactant element decreases by 4.
Alpha Decay
True or false: A half life graph displays a linear pattern
False, it is exponential as we cut things in half each time.
We expect to see mountains at which boundary point?
Convergent
Carbon - 14 is an unstable isotope of Carbon and decays through beta decay. Which would best describe this process?
A. Change in state B. Change in nucleus
C. Change is temp
Change in nucleus
Explain how fission and fusion are different.
Fission is the parent atom's nucleus splitting and fusion is two elements nucleus combining into one.
A type of nuclear change when the nucleus of two atoms combine.
Nuclear Fusion
Which element would be better to use to determine the age of a rock?
Carbon 14 - half life 5700 years
Uranium 235 - Half life 4.5 billions years
Uranium as rocks do not contain carbon.
A line of shallow (severe) earthquakes would occur at which boundary type.
Both, but more at convergent.
When the structure of the nucleus changes and splits this is an example of which type of nuclear change (fission or fusion)?
Fission
Explain why earthquakes can occur at divergent and convergent boundaries.
Plates shifting in general will cause seismic activity to occur. Diverging plates pull away while converging plates cause deeper earthquakes as plates can move under one another.
Describe what happens during alpha decay.
An atom splits and a forms an alpha particle that is actually a helium atom along with one other new element.
Which element would decay faster?
Iodine - 131 = Half life is 8 days
Technitium = 6 hours
Technitium
We expect to see an area of low elevation at which boundary type?
Divergent
Uranium undergoes a series of decays in order to get to a stable state of lead. This nuclear chain reaction is known as what? (Fission or Fusion)
The young rock would form in the middle at the boundary where the plates split and the new magma cools. As the plates pull apart the older rocks will be pushed farther away from the boundary.
Type of nuclear change that occurs when a neutron changes into a proton.
Beta Decay
You have 1000 atoms of Tc. The half life is 6 hours. If 18 hours go by, how much are you left with?
125 atoms
A boundary has a few volcanoes, lots of young rock in the middle, some earthquakes and a low elevation. What boundary type is it?
Divergent
Aluminum foil reacts with copper chloride to produce aluminum chloride and copper metal.
Al + CuCl2 --> AlCl3 + Cu
What type of energy change is this?
Chemical Energy
What would the typical age pattern be at a convergent boundary?
As two plates meet, old rock get recycled and new rock is formed at the boundary often where there are volcanoes (so old rock meets up with young)