Atom Calculator
Calculate the numbers of protons, neutrons, and electrons in any element or isotope.
Calculation Parameters
Specify your chemical inputs.
Calculated Result
Expert Tip
Double check molecular weights and balance equations to ensure stoichiometric ratios are correct.
How this Calculator Works
This calculator computes the number of protons, neutrons, and electrons in an atom or ion based on its atomic number, mass number, and net charge. Adjust the input parameters using the sliders below:
- Atomic Number (Protons, Z): Defines the element (Range: 1 to 118, Default: 6)
- Mass Number (Nucleons, A): The sum of protons and neutrons (Range: 1 to 294, Default: 12)
- Net Charge (C): The electric charge of the atom/ion (Range: -4 to +7, Default: 0)
The results are computed instantly and updated in the results panel on the right.
Formula & Methodology
Where:
- Z: Atomic number (proton count).
- A: Mass number (total nucleons).
- Charge: Net electrical charge of the species.
Step-by-Step Calculation Example
To calculate the atomic structure of a neutral Carbon-12 atom manually, follow these steps:
- Identify the input parameters. For example:
- Atomic Number (Z) = 6
- Mass Number (A) = 12
- Net Charge = 0
- Apply the formula:
Protons = 6 Neutrons = 12 - 6 = 6 Electrons = 6 - 0 = 6
- Verify the calculated value which is updated instantly in the results panel on the right.
Frequently Asked Questions
How do you find the number of protons in an atom? ▼
The number of protons is equal to the atomic number (Z) of the element on the periodic table.
How do you calculate the number of neutrons? ▼
Subtract the atomic number (protons, Z) from the mass number (A): Neutrons = A - Z.
How do you find the number of electrons in an ion? ▼
For a neutral atom, electrons equal protons (Z). For an ion, electrons = Z - (Net Charge).