101Md258
Mendelevium
Actinide · element 101 · f-block (shown below the main table)
Quick facts
| Symbol | Md |
|---|---|
| Atomic number | 101 |
| Relative atomic mass | 258 |
| Category | Actinide |
| Position | f-block (shown below the main table) |
| State at 20 °C | Unknown (too few atoms have been made) |
| Melting point | — |
| Boiling point | — |
| Density | — |
| Electronegativity | — |
| Electron configuration | [Rn] 5f13 7s2 |
About Mendelevium
Mendelevium has the symbol Md and atomic number 101, which means every mendelevium atom has 101 protons in its nucleus and, in a neutral atom, 101 electrons. At room temperature it is unknown (too few atoms have been made).
Actinides are the second row of the f-block. They are all radioactive, and only a few (like uranium and thorium) occur naturally in large amounts.
Explore it
See where mendelevium sits, and drag the temperature slider to watch it melt and boil, on the interactive periodic table. Practise with quizzes on OmniEx.