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An atom has 70 protons, 70 electrons, and 99 neutrons. what is the mass number? group of answer choices

An atom has 70 protons, 70 electrons, and 99 neutrons. what is the mass number? group of answer choices
asked 227k views
12 votes
an atom has 70 protons, 70 electrons, and 99 neutrons. what is the mass number? group of answer choices

asked
User Llekn
by
7.3k points

1 Answer

4 votes

Answer:

169

Step-by-step explanation:

protons+neutrons=atomic mass

70+99=169

answered
User ToddR
by
7.4k points
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