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88 Alkali Alkaline Earth
Ra

Radium

RIS 0.048
Velocity
Rank#38
Co-citedRn
Physical properties
Category Alkaline Earth Metal
Block s-block
State Solid
Config [Rn] 7s2
Electronegativity 0.9
Density 5.5 g/cm³
Melting 973.0 K
Boiling 2010.0 K
Ionization 509.3 kJ/mol
Oxidation +2
Discovered 1898 · Marie Curie, Pierre Curie
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
Journal of Clinical Oncology · 2025 · 99th percentile for its age
Annals of Oncology · 2025 · 99th percentile for its age
2025 · 97th percentile for its age
Top papers, last 5 years
Journal of Clinical Oncology · 2025 · 99th percentile for its age
Annals of Oncology · 2025 · 99th percentile for its age
2025 · 97th percentile for its age
Newest papers
Environments · 2026 · 98th percentile for its age
Annals of Oncology · 2026 · 98th percentile for its age
Nuclear Engineering and Technology · 2026 · 97th percentile for its age

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

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Radium's history

Research intensity over time

Radium's history

Radium's research intensity, 1900 → today.

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Advanced visualization features

Radium's associations

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

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