Zinc (Zn) – element 30
Zinc is a chemical element with the symbol Zn and atomic number 30. It is a transition metal in group 12, period 4 of the periodic table (d-block), and is a solid at room temperature.
Zinc (Zn) has atomic number 30, atomic mass 65.38 u and electron configuration [Ar] 3d10 4s2.
Zinc facts
| Symbol | Zn |
|---|---|
| Atomic number | 30 |
| Atomic mass | 65.38 u (g/mol) |
| Category | transition metal |
| Group | group 12 |
| Period | 4 |
| Block | d-block |
| Phase at 20 °C | Solid |
| Electron configuration | 1s2 2s2 2p6 3s2 3p6 4s2 3d10 |
| Noble-gas notation | [Ar] 3d10 4s2 |
| Electrons per shell | 2, 8, 18, 2 |
Bohr model and shells
Zinc has 30 electrons in 4 shells: 2, 8, 18, 2. Full configuration and noble-gas notation are in the table; work out any element or ion with the electron configuration calculator.
Physical and atomic properties
| Melting point | 692.68 K (419.5 °C) |
|---|---|
| Boiling point | 1180 K (906.9 °C) |
| Density | 7.14 g/cm³ |
| Electronegativity (Pauling) | 1.65 |
| Electron affinity | -58 kJ/mol |
| Ionization energies | 906.4, 1733.3, 3833 kJ/mol (1st, 2nd, 3rd) |
| Molar heat capacity | 25.47 J/(mol·K) |
| Discovered by | India |
Use the atomic mass in the molar mass calculator for any formula containing Zn.
Position in the periodic table
Tap any element to open its page.
Frequently asked questions
What is the atomic mass of zinc?
The atomic mass of zinc is 65.38 u, so one mole of zinc atoms weighs 65.38 g.
What is the electron configuration of zinc?
Zinc has 30 electrons: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰, or [Ar] 3d¹⁰ 4s² in noble-gas notation. Electrons per shell: 2, 8, 18, 2.
Is zinc a metal?
Yes. Zinc is a transition metal.
Where is zinc on the periodic table?
Zinc is in group 12, period 4, in the d-block.
Data: Periodic-Table-JSON (CC BY-SA 3.0); standard atomic weights from IUPAC (abridged). Values in brackets are the mass number of the longest-lived isotope.