40
Zr
91.224
Zirconium (Zr)
Element 40 · Period 5 · Group 4
transition-metal
solid at room temp
d-block
About Zirconium
Highly corrosion-resistant. Used in nuclear reactors and zirconia gemstones.
Physical Properties
Atomic Mass
91.224 u
State at 25°C
Solid
Melting Point
1855 °C
Boiling Point
4409 °C
Density
6.52 g/cm³
Magnetism
Paramagnetic
Atomic Properties
Electron Configuration
[Kr] 4d² 5s²
Electron Shells
2, 8, 18, 10, 2
Electronegativity
1.33
Atomic Radius
206 pm
Ionization Energy
640 kJ/mol
Oxidation States
+4
Discovery & History
Discovered By
Martin Heinrich Klaproth
Discovery Year
1789
Named By
Martin Heinrich Klaproth
Name origin: Persian: zargun (gold-like)
Frequently Asked Questions
- Is Zirconium a metal, nonmetal, or metalloid?
- Zirconium is classified as a transition-metal.
- What state is Zirconium in at room temperature?
- Zirconium is a solid at standard room temperature (25°C).
- What is the atomic mass of Zirconium?
- Zirconium has an atomic mass of 91.224 atomic mass units (u).
- Who discovered Zirconium?
- Zirconium was discovered by Martin Heinrich Klaproth in 1789.
- Where is Zirconium on the periodic table?
- Zirconium is element number 40, located in period 5 and group 4.