The ratio of neutrons to protons of an element having a mass number and atomic number of 80 and 40 respectively is ___________________?
Correct answer: A. 1
- A. 1
- B. 0.5
- C. 2
- D. 4
Explanation
The neutron number is mass number minus atomic number: 80 − 40 = 40. Since the proton number is 40, the neutron-to-proton ratio is 40/40 = 1.
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