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10 problems in radioactivity

The reaction represented by the description "An atom of lead-210 decays by emission of an alpha particle" is:

Question 3
The reaction represented by the description "An atom of copper-66 decays by beta emission" is

Question 4
The reaction represented by the description "An atom of titanium-45 decays by positron emission" is

Question 5
The reaction represented by the description "An atom of metastable strontium-87 undergoes gamma decay" is

Question 6 T
The reaction represented by the description "An atom of selenium-75 undergoes electron capture" is

Question 7

Beta emission can best be described as

a. emission of two protons and two neutrons from an unstable nucleus.
b. transformation of a neutron into a protron and an electron that is ejected from the nucleus.
c. transformation of a proton into a neutron by combination with an electron.
d. annihilation of a beta particle by a positron.
e. annihilation of a neutrino by an anti-neutrino.

Question 8
Alpha emission can best be described as
a. emission of two protons and two neutrons from an unstable nucleus.
b. transformation of a proton into a neutron and an electron that is ejected from the nucleus.
c. transformation of a proton into a neutron by combination with an electron.
d. annihilation of a beta particle by a positron.
e. annihilation of a neutrino by an anti-neutrino.

Question 9
All of these are common modes of radioactive decay except __________.

a. alpha emission
b. beta emission
c. electron capture
d. positron emission
e. phosphorescence

Question 10
The rule that the mass number of stable isotopes is always at least twice the atomic number is true for all nuclides except

a. helium-3
b. beryllium-10
c. strontium-90
d. magnesium-28
e. vanadium-52

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Solution Summary

The solution shows how to utilize conservation of charge, energy and mass to solve problems relation to radioactive decay.

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