Exercises

Give the number of protons and the number of neutrons in the nucleus of each of the following isotopes:
(a) cobalt-60Answer
(b) potassium-40Answer
(c) neon-24Answer
(d) lead-208Answer
Write the nuclear symbols for each of the nuclei in exercise 1.Answer
Predict if the nuclei in exercise 1 are radioactive or stable.(a)Answer (b)Answer (c)Answer (d)Answer
Write a nuclear equation for the decay of the following nuclei as they give off a beta particle:
(a)³⁶₂₆Fe
(b)⁷₄Be
(c)⁶⁴₂₉Cu
(d)²⁴₁₁Na
(e)²¹⁴₈₂Pb
(f)³²₁₅PAnswer
Write a nuclear equation for the decay of the following nuclei as they undergo alpha emission:
(a)²³⁵₉₂U
(b)²²⁶₈₈Ra
(c)²³⁹₉₄Pu
(d)²¹⁴₈₃Bi
(e)²³⁰₉₀Th
(f)²¹⁰₈₄PoAnswer
The half-life of iodine-131 is 8 days. How much of a 1.0 oz sample of iodine-131 will remain after 32 daysAnswer?
If the half-life of strontium-90 is 27.6 years, what is the decay constant for strontium-90Answer?
Using the decay constant for strontium-90 obtained in exercise 7, find the number of nuclear disintegrations over a period of time for a molar mass of strontium-90.Answer
What is the activity in curies of the molar mass of strontium-90 described in exercise 8Answer?
How much energy must be supplied to break a single iron-56 nucleus into separate protons and neutronsAnswer? (The mass of an iron-56 nucleus is 55.9206 u, one proton is 1.00728 u, and one neutron is 1.00867 u.)

2002 McGraw-Hill Higher Education
Any use is subject to the Terms of Use and Privacy Policy.
McGraw-Hill Higher Education is one of the many fine businesses of The McGraw-Hill Companies.