← Back to the table

Every score here is current — nothing is delayed. Personal members see monthly resolution →
26 Transition Metal
Fe

Iron

RIS 0.256
Velocity
Rank#5
Co-citedNd
Physical properties
Category Transition Metal
Block d-block
State Solid
Config [Ar] 3d6 4s2
Electronegativity 1.83
Density 7.874 g/cm³
Melting 1811.0 K
Boiling 3134.0 K
Ionization 762.5 kJ/mol
Oxidation +2, +3, +4, +5, +6
Discovered Known since antiquity
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.

Free →

Unlocks with a free account.

Top papers of all time
Applied Mathematics Letters · 2025 · 100th percentile for its age
Chemico-Biological Interactions · 2025 · 100th percentile for its age
Archives of Toxicology · 2024 · 100th percentile for its age
Top papers, last 5 years
Applied Mathematics Letters · 2025 · 100th percentile for its age
Chemico-Biological Interactions · 2025 · 100th percentile for its age
Archives of Toxicology · 2024 · 100th percentile for its age
Newest papers
Nano-Micro Letters · 2026 · 100th percentile for its age
Atiqot · 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.

Found one worth keeping? Personal remembers it for you, in a reading list you can come back to.

Iron's history

Research intensity over time

Iron's history

Iron's research intensity, 1900 → today.

See how it got here — free account.
Advanced visualization features

Iron's associations

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

Unlocks with a free account.