Md

Mendelevium · element 101

Actinide · Solid at room temperature

Mendelevium is a synthetic element with chemical symbol Md (formerly Mv) and atomic number 101. A metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities through neutron bombardment of lighter elements. It is the antepenultimate actinide and the ninth transuranic element.

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This is only an illustration, not mendelevium itself. Chemically similar to Thulium, the highly radioactive heavy metal emits very energetic α-radiation.
This is only an illustration, not mendelevium itself. Chemically similar to Thulium, the highly radioactive heavy metal emits very energetic α-radiation. - Chemical Elments A Virtual Museum under a Creative Commons Attribution 3.0 Unported License, source: https://images-of-elements.com/mendelevium.php

Key facts

Atomic mass
258 u
how heavy one atom is
Phase (room temp.)
Solid
Melting point
1100 K (827 °C)
when solid turns to liquid
Period
7
its row in the periodic table
Group
3
its column in the periodic table
Block
F-block
the neighbourhood it lives in
Electronegativity
1.3
how strongly it pulls electrons
Electron configuration
[Rn] 5f13 7s2
where its electrons live
Shells
2 · 8 · 18 · 32 · 31 · 8 · 2
electrons in each layer, inside to out
Discovered by
Lawrence Berkeley National Laboratory
who found it

Source: Wikipedia

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