Atom Particle Calculator
Result
Atom Particle Calculator Work out the number of protons, neutrons and electrons in an atom or ion from its atomic number (Z), mass number (A) and charge. Protons equal Z, neutrons equal A − Z, and electrons equal Z minus the net charge. Enter the numbers — free online calculator.
Formula
- Atom Particle Calculator calculates its result from Z, A, Charge. It uses the formula Protons = Z, Neutrons = A - Z, Electrons = Z - charge. Change any input to recalculate the result instantly.
- The main inputs are Z, A, Charge. Enter them in the units and format shown in the calculator.
- Use the units, labels and assumptions shown beside each input so the formula is applied consistently.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Atom Particle
- Z: 2
- A: 3
- Charge: 4
Using Z = 2, A = 3, Charge = 4, the calculated result is -2.
Sample result: Calculating…
Frequently asked questions
What does the Atom Particle calculate?
Atom Particle Calculator Work out the number of protons, neutrons and electrons in an atom or ion from its atomic number (Z), mass number (A) and charge. Protons equal Z, neutrons equal A − Z, and electrons equal Z minus the net charge. Enter the numbers — free online calculator.
Which values should I enter?
Enter Z, A, Charge using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: Protons = Z, Neutrons = A - Z, Electrons = Z - charge.
Why might my result differ from another source?
Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.