Mendelevium (Md)
Mendelevium (Md, element 101) is an actinide in period 7. Atomic mass 258, electron configuration [Rn] 5f¹³ 7s², uses and facts.
About Mendelevium
Mendelevium is an actinide with the symbol Md and atomic number 101. It is a solid at room temperature, and it sits in period 7 of the periodic table. Mendelevium was discovered in 1955 by Albert Ghiorso.
Mendelevium key facts
- Atomic number: 101
- Symbol: Md
- Atomic mass: 258 u
- Category: actinide
- Group: none (f-block)
- Period: 7
- State at room temperature: solid
- Electron configuration: [Rn] 5f¹³ 7s²
- Electronegativity (Pauling): 1.3
- Melting point: 1100 K (826.85 °C)
- Boiling point: not known
- Density: not known
- Common oxidation states: +2, +3
Electron configuration
The electron configuration of mendelevium is [Rn] 5f¹³ 7s². The part in brackets is the noble gas core; the rest shows how the outer electrons fill their subshells.
Uses of mendelevium
- Research only
Did you know?
Named after Dmitri Mendeleev, creator of the periodic table. Only a few atoms are produced at a time.
Neighbouring elements
- Fermium (Fm)
- Nobelium (No)
- Actinium (Ac)
- Thorium (Th)
- Protactinium (Pa)
- Uranium (U)
- Neptunium (Np)
- Plutonium (Pu)
- Americium (Am)
- Curium (Cm)
Frequently asked questions
What is the atomic number of mendelevium?
The atomic number of mendelevium is 101, which means every mendelevium atom has 101 protons.
What is the electron configuration of mendelevium?
The electron configuration of mendelevium is [Rn] 5f¹³ 7s².
What group and period is mendelevium in?
Mendelevium is an actinide in period 7.
What state is mendelevium at room temperature?
Mendelevium is a solid at room temperature.
What is mendelevium used for?
Mendelevium is used for research only.