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7 Reactive Nonmetal
N

Nitrogen

RIS 0.073
Velocity
Rank#28
Co-citedGa
Physical properties
Category Nonmetal
Block p-block
State Gas
Config [He] 2s2 2p3
Electronegativity 3.04
Density 0.0012506 g/cm³
Melting 63.15 K
Boiling 77.36 K
Ionization 1402.3 kJ/mol
Oxidation -3, -2, -1, +1, +2, +3, +4, +5
Discovered 1772 · Daniel Rutherford
10-year trends

Research trends from the past decade for this element.

Research trends from the past decade: publication rate, citation momentum, emerging applications. A bird's-eye view of how the field has been evolving.

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Top papers of all time
Figshare · 2025 · 100th percentile for its age
National Science Review · 2025 · 100th percentile for its age
Nature Communications · 2025 · 100th percentile for its age
Top papers, last 5 years
Figshare · 2025 · 100th percentile for its age
National Science Review · 2025 · 100th percentile for its age
Nature Communications · 2025 · 100th percentile for its age
Newest papers
ChemSusChem · 2026 · 100th percentile for its age
Metals Advances · 2026 · 100th percentile for its age
Bioresource Technology · 2026 · 100th percentile for its age

These are the nine that matter most. There are more — browse all of them free.

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Nitrogen's history

Research intensity over time

Nitrogen's history

Nitrogen's research intensity, 1900 → today.

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Advanced visualization features

Nitrogen's associations

These shapes are citation clusters: groups of papers that cite each other. They show why Nitrogen is moving, not just that it is.

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