Atomic Properties of Md
- Atomic Number of Md
- 101
- Atomic Mass of Md
- 258.0000 u
- Electron Configuration
- [Rn] 5f13 7s2
- Electronegativity
- 1.30
- Block
- f-block
- Group
- —
- Period
- 7
Mendelevium always looks slightly surprised to exist at all. He was discovered one atom at a time in a particle accelerator, nudged into being and then immediately studied before he faded.
Named after Dmitri Mendeleev, the architect of the periodic table, he feels an enormous sense of responsibility. “He left blanks for us,” Md says quietly. “I just had to show up.”
Because he is so short-lived and hard to make, Mendelevium appears only in the most patient experiments. Researchers coax him into existence in minuscule quantities, then rush to measure whatever they can.
He is shy, polite, and deeply honored to carry his name.
Mendelevium reminds students that the periodic table isn’t finished; it’s a living project, still being filled in at the edges.