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100 Actinide
Fm

Fermium

RIS 0.000
Velocity
Rank#101
Co-citedEs
Physical properties
Category Actinide
Block f-block
State Solid
Config [Rn] 5f12 7s2
Electronegativity 1.3
Density 9.7 g/cm³
Melting 1800.0 K
Ionization 627.0 kJ/mol
Oxidation +2, +3
Discovered 1952 · Albert Ghiorso and others
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
Progress in Particle and Nuclear Physics · 2025 · 78th percentile for its age
Nature · 2024 · 72nd percentile for its age
International Journal of Modern Physics E · 2024 · 60th percentile for its age
Top papers, last 5 years
Progress in Particle and Nuclear Physics · 2025 · 78th percentile for its age
Nature · 2024 · 72nd percentile for its age
International Journal of Modern Physics E · 2024 · 60th percentile for its age
Newest papers
ReDATA · 2026 · 32nd percentile for its age
ReDATA · 2026 · 32nd percentile for its age
Open MIND · 2026 · 32nd percentile for its age

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Fermium's history

Research intensity over time

Fermium's history

Fermium's research intensity, 1900 → today.

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Advanced visualization features

Fermium's associations

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

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