How can I calculate the number of neutrons in the nucleus of an atom?

Answer 1

It is easy to determine the number of neutrons in an atom's nucleus by subtracting the element's mass number from its atomic, or proton, number.

Consider the copper isotope Cu-63, which has 29 protons and a mass number of 63, as implied by its name. To find the number of neutrons, you deduct the mass number (63) from the atomic number (29), which comes out to 46. This means that Cu-63 has 29 protons and 46 neutrons.

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Answer 2

Nicholas Agrusa

To calculate the number of neutrons in the nucleus of an atom, subtract the atomic number (number of protons) from the mass number (sum of protons and neutrons). The formula is:

Number of neutrons = Mass number - Atomic number

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.