How do you figure out how many neutrons a atom has?

Answer 1

You find out the charge of nucleus (a number of protons), multiply it by mass of proton. Then substitute the result from the mass of nucleus and divide by mass of neutron. The result will give number of neutrons in the nuclei.

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Answer 2

You find out the Atomic Mass and atomic number and simply use the equation:

atomic mass - atomic number = number of neutrons there are

e.g. Aluminum has an atomic mass of 27 and and atomic number of 13, so it has 14 neutrons, simple

Answer 3

To determine the number of neutrons in an atom, subtract the atomic number (number of protons) from the atomic mass (rounded to the nearest whole number). Neutrons do not carry an electrical charge and are found in the nucleus of an atom along with protons.

Answer 4

Look up the atom on the Periodic Table of elements and subtract its atomic mass minus its atomic number.