Atomic Number
7
Element 7
Nitrogen (N)
Nitrogen is a chemical element with symbol N and atomic number 7. It was discovered by Daniel Rutherford in 1772. About 78% of Earth's atmosphere is nitrogen.
Atomic Mass
14.007 u
Category
Nonmetal
Period
2
Group
Group 15: nitrogen group
Phase
gas
Density
0.0012506 g/cm3
Electron Shells
2, 5
Atomic Structure
Protons: 7. Electrons: 7. Neutrons: Varies by isotope.
Electron configuration: 1s² 2s² 2p³
Why Nitrogen Matters
Nitrogen helps connect atomic number 7, nonmetal behavior, period 2 trends, and electron shell structure. Its gas phase, atomic mass of 14.007 u, and electron configuration 1s² 2s² 2p³ make it useful for comparing bonding patterns across the periodic table.
Discovery and Occurrence
Nitrogen was discovered 1772 by Daniel Rutherford. Nitrogen is a chemical element with symbol N and atomic number 7. It was discovered by Daniel Rutherford in 1772. About 78% of Earth's atmosphere is nitrogen.
Safety and Handling Context
Nitrogen is a gas at standard conditions. Gas cylinders and concentrated gases should be handled only with proper ventilation and equipment.
Related Elements
Frequently Asked Questions
- What is the atomic number of Nitrogen?
- Nitrogen has atomic number 7, which means a neutral atom has 7 protons and 7 electrons.
- What is the chemical symbol for Nitrogen?
- The chemical symbol for Nitrogen is N.
- What category is Nitrogen in?
- Nitrogen is classified as a nonmetal and sits in period 2 of the periodic table.
Explore Nitrogen in 3D
Use the interactive table above to rotate atomic models, compare periodic trends, and move from Nitrogen to neighboring elements without losing your place.