---
title: "Nitrogen (N): Atomic Mass, Electron Configuration & Properties"
url: https://www.moldraw.com/elements/nitrogen.html
description: "Nitrogen (N), element 7: atomic mass 14.007, electron configuration [He] 2s² 2p³, group 15, period 2, p-block reactive nonmetal. Melting and boiling point, density, electronegativity and shells."
lang: en
publisher: Scidart Academy
generated: 2026-11-03
---
7N14.007

# Nitrogen (N) – element 7

Nitrogen is a chemical element with the symbol **N** and atomic number **7**. It is a reactive nonmetal in group 15 (pnictogens), period 2 of the periodic table (p-block), and is a gas at room temperature.

Nitrogen (N) has atomic number 7, atomic mass 14.007 u and electron configuration [He] 2s2 2p3.

[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)

## Nitrogen facts

| Symbol | N |
| --- | --- |
| Atomic number | 7 |
| Atomic mass | 14.007 u (g/mol) |
| Category | reactive nonmetal |
| Group | group 15 (pnictogens) |
| Period | 2 |
| Block | p-block |
| Phase at 20 °C | Gas |
| Electron configuration | 1s2 2s2 2p3 |
| Noble-gas notation | [He] 2s2 2p3 |
| Electrons per shell | 2, 5 |
| Valence electrons | 5 |

## Bohr model and shells

Nitrogen has 7 electrons in 2 shells: 2, 5. 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 | 63.15 K (-210.0 °C) |
| --- | --- |
| Boiling point | 77.355 K (-195.8 °C) |
| Density | 1.251 g/L |
| Electronegativity (Pauling) | 3.04 |
| Electron affinity | -6.8 kJ/mol |
| Ionization energies | 1402.3, 2856, 4578.1 kJ/mol (1st, 2nd, 3rd) |
| Discovered by | Daniel Rutherford |

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 N.

## Position in the periodic table

Tap any element to open its page.

## Molecules with nitrogen

- [Adenine](https://www.moldraw.com/molecules/adenine.html)
- [Adrenaline](https://www.moldraw.com/molecules/adrenaline.html)
- [Alanine](https://www.moldraw.com/molecules/alanine.html)
- [Ammonia](https://www.moldraw.com/molecules/ammonia.html)
- [ATP](https://www.moldraw.com/molecules/atp.html)
- [Caffeine](https://www.moldraw.com/molecules/caffeine.html)
- [Cytosine](https://www.moldraw.com/molecules/cytosine.html)
- [Dopamine](https://www.moldraw.com/molecules/dopamine.html)
- [Folic acid](https://www.moldraw.com/molecules/folic-acid.html)
- [Glycine](https://www.moldraw.com/molecules/glycine.html)
- [Guanine](https://www.moldraw.com/molecules/guanine.html)
- [Histamine](https://www.moldraw.com/molecules/histamine.html)

Rotate each one in 3D, or draw your own structure in [MolDraw](https://www.moldraw.com/).

## Frequently asked questions

### What is the atomic mass of nitrogen?

The atomic mass of nitrogen is 14.007 u, so one mole of nitrogen atoms weighs 14.007 g.

### What is the electron configuration of nitrogen?

Nitrogen has 7 electrons: 1s² 2s² 2p³, or [He] 2s² 2p³ in noble-gas notation. Electrons per shell: 2, 5.

### How many valence electrons does nitrogen have?

Nitrogen has 5 valence electrons (group 15).

### Is nitrogen a metal?

No. Nitrogen is a nonmetal (reactive nonmetal).

### Where is nitrogen on the periodic table?

Nitrogen is in group 15 (pnictogens), period 2, in the p-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.