Atom Calculator

Calculate Protons, Neutrons, and Electrons from Atomic Information

Atomic number •••

Mass number •••

Charge •••

⌃ Atomic composition

Number of protons •••

Number of neutrons •••

Number of electrons •••

Check our examples:

• Example 1 — Neutral sodium atom (Na)

• Example 2 — Sulfide anion (S²⁻)

• Example 3 — Calcium cation (Ca²⁺)

Your element is

and its AZE notation is

The total mass of your atom is .

Atomic Number

Mass Number

Charge

Element

Protons

Neutrons

Electrons

How it works: The atomic number gives the number of protons. Neutrons are calculated by subtracting the atomic number from the mass number. The charge determines the number of electrons.