Cm

Curium · element 96

Actinide · Solid at room temperature

Curium is a transuranic radioactive chemical element with symbol Cm and atomic number 96. This element of the actinide series was named after Marie and Pierre Curie – both were known for their research on radioactivity. Curium was first intentionally produced and identified in July 1944 by the group of Glenn T. Seaborg at the University of California, Berkeley.

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A piece of curium, which emitts strong radiation that makes it glow
A piece of curium, which emitts strong radiation that makes it glow - European Union, The Actinide Group, Institute for Transuranium Elements (JRC-ITU), source: https://images-of-elements.com/curium.php

Key facts

Atomic mass
247 u
how heavy one atom is
Phase (room temp.)
Solid
Density
13.51 g/cm³
how tightly packed it is
Melting point
1613 K (1340 °C)
when solid turns to liquid
Boiling point
3383 K (3110 °C)
when liquid turns to gas
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
1.28
how strongly it pulls electrons
Electron configuration
[Rn] 5f7 6d1 7s2
where its electrons live
Shells
2 · 8 · 18 · 32 · 25 · 9 · 2
electrons in each layer, inside to out
Discovered by
Glenn T. Seaborg
who found it
Appearance
silvery metallic, glows purple in the dark
what it looks like

Source: Wikipedia

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