Question 1 1 points Save
An atom with 15 protons and 18 neutrons would be an isotope of
Question 2 1 points Save
Relative to the sum of the masses of its constituent nucleons (neutrons + protons), the mass of a nucleus is
always the same.
sometimes the same and sometimes smaller.
sometimes greater and sometimes smaller.
Question 3 1 points Save
WhenU is bombarded with one neutron, fission occurs and the products are three neutrons,Cs and
Question 4 1 points Save
The half-life of the radioisotope Eu is 1.0 hr. The decay of a 160.0-g sample of the isotope to 1.25 g requires
Question 5 1 points Save
A living tree contains C (half-life 5,600 years) and has a specific activity of 750 counts per hour. A wooden artifact recovered from an archeological site gives a count of 190 counts per hour. The age of this artifact is most nearly
Question 6 1 points Save
The half-life of K is 12.5 hours. How much will remain after 100 hours if the original sample contained 256 g of K?
Question 7 1 points Save
When Cu undergoes positron emission, what is the immediate nuclear product?
Question 8 1 points Save
As a radioactive isotope decays, its rate constant
remains the same.
Question 9 1 points Save
The isotope Pb has a half-life of 22 years. What percentage of a pure Pb sample prepared in April 1937 remains in April 1993?
log = ; t1/2 =
Question 10 1 points Save
What is the binding energy per nucleon, in joules, of a chlorine-35 atom, given that the atomic mass equals 34.9595 amu?
(e- mass = 0.00055 amu, n mass = 1.00867 amu, p mass = 1.00728 amu,
c = 3.00 x 108 m/s, 1 amu = 1.6606 x 10-24 g, 1 J = 1 kg m2/s2)
1.56 x 10-12 J/nucleon
1.56 x 10-11 J/nucleon
1.56 x 10-10 J/nucleon
1.41 x 10-12 J/nucleon
4.93 x 10-11 J/nucleon