Chemistry Ch.21
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Original mass is represented by __.
N
_{o}
Remaining mass is represented by __.
N
_{r}
The number of half lives is represented by __.
x
^{n}
Decayed mass is represented by__.
N
_{d}
Total times is represented by __.
T
_{t}
Half life is represented by __.
T
_{1/2}
What is the equation used to find the number of remaining mass?
N
_{r }
=
^{No }
/
_{2n}
^{}
What is the equation to find the number of the original mass?
N
_{o}
= N
_{r}
+N
_{d}
What is the equation to find the number of halflives?
n= t
_{t }
/ T
_{1/2}
Alpha always has ____.
+
^{4}
_{2 }
He
Beta (electron emission) always has ____.

^{0}
_{1}
e
Beta+ (positron capture) always has ____.
+
^{0}
_{1}
e
or
+
^{0}
_{1}
B
Electron capture always has ___.

^{0}
_{1}
e +
Gama always has ___.
y
neutrons always has ____.
^{1}
_{0}
n
When a nucleus splits it is called ___.
fission
When a nucleus combines with two or more nuclei to form a different nucleus it is called ___.
fussion
Name the four types of decay.
Alpha, Beta (electron emission), Beta+ (positron capture), and Gamma
The difference between the mass of an atom and the sum of the masses of its protons, neutrons, and electrons.
mass defect
the energy that holds the protons together in the nucleus of an atom
nuclear binding energy
What is Einstein's equation for finding energy?
e=mc
^{2}
energy = mass defect x the speed of light
^{2}
What ratio provides the most stability for atoms with low atomic numbers? Large atomic numbers?
n/p = 1/1
n/p = 1.5/1
a reaction that affects the nucleus of an atom.
nuclear reaction
What happens beyond the atomic number 83?
the repulsive force of the protons is so great that no stable nuclides exist.
the transformation of atoms of one element into atoms of a different element due to a nuclear reaction.
transmutation
one way transmutation can occur.
radioactive decay
the electromagnetic radiation or particles emitted from the nucleus during radioactive decay.
radioactive radiation
Three principle types of nuclear radiation.
Alpha Particle
Beta Particle
Gamma Ray
Card Set Information
Author:
8thgradeclass
ID:
294735
Filename:
Chemistry Ch.21
Updated:
20150203 15:46:55
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