Name:  Promethium

Atomic Symbol and Mass Number: Pm [61]

Electron Configuration: [Xe] 4f 6s

Atomic Radii: 183 pm

Electron Affinity: 50 kJ mol‑1

Oxidation States: +3, +2

Electronegativity Value: 1.13

Elemental Group: Lanthanide

Uses and Properties:

• Praseodymium is commonly used as an alloying agent with magnesium to create high-strength metals used in aircraft engines.

• It's also a component of mischmetal, a material that is used to make flints for lighters, and in carbon arc lights, used in the motion picture industry for studio lighting and projector lights

• Most promethium is used for research purpose.

• It can be used as beta radiation source in luminous paint, in nuclear batteries for guided missiles, watches, pacemakers and radios, and as a light source for signals.

• It is possible that in future it will be used as portable X-ray source.

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Lewis Diagram: