Determine the nuclear composition (number of protons and neutrons) of the following isotopes.
(a) chlorine-35
protons |
|
neutrons |
(b) nickel-58
protons |
|
neutrons |
(c) silver-107
protons |
|
neutrons |
(d) barium-138
protons |
|
neutrons |
(e) lead-208
protons |
|
neutrons |
Solution:
Let us go to the basics first.
(a) chlorine-35
An atom of chlorine-35 contains 18 neutrons (17 protons + 18 neutrons = 35 particles in the nucleus) (Answer)
(b) nickel-58
An atom of nickel-58 contains 30 neutrons (28 protons + 30 neutrons = 58 particles in the nucleus) (Answer)
(c) silver-107
An atom of silver-107 contains 60 neutrons (47 protons + 60 neutrons = 107 particles in the nucleus) (Answer)
(d) barium-138
An atom of barium-138 contains 82 neutrons (56 protons + 82 neutrons = 138 particles in the nucleus) (Answer)
(e) lead-208
An atom of lead-208 contains 126 neutrons (82 protons + 126 neutrons = 208 particles in the nucleus) (Answer)
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