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An isotope of mercury has 80 protons and 120 neutrons. What is the mass number of this isotope? 40 80 120 200
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An isotope of mercury has 80 protons and 120 neutrons. What is the mass number of this isotope?

40

80

120

200

User Ceri Turner
by
8.0k points

1 Answer

1 vote
the correct answer is two hundred for its mass number as eighty plus hundred and twenty is two hundred hence the answer is the last option
User Sandy Muspratt
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