Zirconium (Zr) — Transition metal. Atomic number 40.
Gray-white lustrous metal
- Atomic number: 40
- Symbol: Zr
- Atomic mass: 91.224 u
- Category: Transition metal
- State: Solid
- Melting point: 1854.85 °C / 2128 K
- Boiling point: 4408.85 °C / 4682 K
- Density: 6.52 g/cm³ (20°C)
- Electron configuration: [Kr] 4d2 5s2
- Oxidation states: +4
- Electronegativity: 1.33
- Discovered by: Martin Heinrich Klaproth (1789)
Common uses: Nuclear reactors, Ceramics, Surgical tools
Biological role: No known biological role.
Frequently Asked Questions about Zirconium
What is the atomic number of zirconium?
Zirconium has an atomic number of 40, meaning each atom contains 40 protons in its nucleus.
What is the atomic mass of zirconium?
The standard atomic weight of zirconium is 91.224 u (unified atomic mass units).
What category does zirconium belong to?
Zirconium is classified as a transition metal.
What is the state of zirconium at room temperature?
Zirconium is a solid at 20 °C (68 °F).
What is the melting point of zirconium?
The melting point of zirconium is 1854.85 °C / 2128 K.
What is the boiling point of zirconium?
The boiling point of zirconium is 4408.85 °C / 4682 K.
What is the density of zirconium?
The density of zirconium is 6.52 g/cm³ (20°C).
What is the electronegativity of zirconium?
Zirconium has a Pauling electronegativity of 1.33.
What is the electron configuration of zirconium?
The electron configuration of zirconium is [Kr] 4d2 5s2.
What are the common oxidation states of zirconium?
Zirconium commonly exhibits the following oxidation states: +4.
When was zirconium discovered?
Zirconium was discovered in 1789 by Martin Heinrich Klaproth.
Is zirconium radioactive?
Zirconium is a stable element with no naturally occurring radioactive isotopes.
What is the biological role of zirconium?
No known biological role.
What are the common uses of zirconium?
Zirconium is used for: Nuclear reactors; Ceramics; Surgical tools.
