Name the first three isotopes of hydrogen and their nuclide symbols, and indicate which is most common and which is most unstable
What will be an ideal response?
ordinary hydrogen 1H , deuterium 2H , and tritium 3H ; 1H being most common and 3H most unstable decaying with a 12. year half life.
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Radioactive Decay: The decay rate of a radioactive sample decreases from 175 kBq to 12.4 kBq in 18.3 s. What is the decay constant of this sample?
Fill in the blank(s) with the appropriate word(s).
How many possible sets of electron states (or quantum numbers) are there in the 5f subshell?
A) 2 B) 8 C) 10 D) 14
A bicyclist starts from rest at the top of a hill and rolls down the hill without pedaling. Assuming there is no friction and the bottom of the hill is 20 meters below the top, what is the bicyclist's speed at the bottom of the hill?
Two long bar magnets are aligned so that north poles face each other. The magnets are separated by 1 cm, and a repulsive force between the north poles is 0.04 N. When the separation is increased to 2 cm the force will be
A. 0.020 N. B. 0.050 N. C. 0.40 N. D. 0.025 N. E. 0.010 N.