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40 Transition Metal
Zr

Zirconium

RIS 0.049
Velocity +0.001
Rank#32
Co-citedPb

Zirconium (Zr) is a transition metal with atomic number 40: a neutral zirconium atom has 40 protons and 40 electrons. Atomic mass 91.224 u, electron configuration [Kr] 4d2 5s2. Zirconium is a corrosion-resistant metal used in nuclear reactors and as a diamond substitute.

Physical properties
Atomic mass 91.224 u
Category Transition Metal
Block d-block
State Solid
Config [Kr] 4d2 5s2
Electronegativity 1.33
Density 6.506 g/cm³
Melting 2128.0 K
Boiling 4682.0 K
Ionization 640.1 kJ/mol
Oxidation +1, +2, +3, +4
Discovered 1789 · Martin Heinrich Klaproth
Zirconium's history

Research intensity over time

Research communities behind this literature

Groups of papers that cite each other densely, with the share of Zirconium's tracked research in each.