61
Pm
Promethium
145.0 u
Promethium
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"Promethium." Element, /element/pm/.
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Period
6
Group
—
Block
f-block
Phase (STP)
Solid
Promethium is the only radioactive lanthanide with no stable isotopes. It is used in luminous paint and nuclear batteries.
More Lanthanide
Frequently Asked Questions
What is Promethium?
Promethium (Pm) is a chemical element with atomic number 61. It is a solid at standard temperature and pressure, classified as a lanthanide.
What are the key properties of Promethium?
Promethium has an atomic mass of 145.0 u.
What is the electron configuration of Promethium?
The electron configuration of Promethium is [Xe] 4f5 6s2. It is in the f-block of the periodic table.
What is the electronegativity of Promethium?
Promethium has an electronegativity of 1.13 on the Pauling scale.