Asked by Amy~

How would I determine the ratio of neutrons and protons in the nucleus of each atom?

1) He 2protons , 2 neutrons

Answers

Answered by joejoe
For any element:

Number of Protons = Atomic Number

Number of Electrons = Number of Protons = Atomic Number

Number of Neutrons = Mass Number - Atomic Number

For krypton:

Number of Protons = Atomic Number = 36

Number of Electrons = Number of Protons = Atomic Number = 36

Number of Neutrons = Mass Number - Atomic Number = 84 - 36 = 48
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