Concept explainers
Mercury An isotope of mercury has 80 protons and 120 neutrons. What is the mass number of this isotope?
Interpretation:
Mass number of an isotope of mercury with 80 protons and 120 neutrons is to be calculated.
Concept introduction:
Mass number is the sum of total protons and neutrons present in the nucleus of an atom.
Answer to Problem 68A
Explanation of Solution
Mass number is the total number of protons and neutrons present in the nucleus of an atom.
Therefore,
Mass number is 200
An isotopes of mercury with 80 protons and 120 neutrons have a mass number of 200
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