---
title: "Zinc (Zn): Atomic Mass, Electron Configuration & Properties"
url: https://www.moldraw.com/elements/zinc.html
description: "Zinc (Zn), element 30: atomic mass 65.38, electron configuration [Ar] 3d¹⁰ 4s², group 12, period 4, d-block transition metal. Melting and boiling point, density, electronegativity and shells."
lang: en
publisher: Scidart Academy
generated: 2026-11-03
---
30Zn65.38

# 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.

[Download periodic table PDF](https://www.moldraw.com/printables/periodic-table.pdf)[Open interactive periodic table](https://www.moldraw.com/tools/free-chem-tools/interactive-periodic-table.html)

## 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](https://www.moldraw.com/tools/free-chem-tools/electron-configuration-calculator.html).

## 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](https://www.moldraw.com/tools/free-chem-tools/molar-mass-calculator.html) 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](https://github.com/Bowserinator/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.