Samarium (Sm)

By Amy Winger

Properties

Physical Properties

Atomic Mass: 150.36

Atomic Radius: 238 pm

Density: 7.353 g/cc

Melting Point: 1072°C (1962°F)

Boiling Point:1794°C

Appearance: silver luster,


Conductivity: (metal) high

Malleability: low

Hardness: low

Other physical properties: magnetic

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Chemical Properties

Flammability: unknown

Reactivity: unknown

Room Temperature

Solid

Identifying Info

Atomic Structure

Atomic Number : 62 Mass Number: 150.36 Protons: 62

Neutrons: 88 Electrons: 62

Location on the Periodic Table

(Number 62) next to last line at the bottom, five in from the right.

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History and Discovery

When was Samarium discovered?

1879

Where was Samarium discovered?

Switzerland (first observed), France (first really pulled apart and studied).

Who Discovered Samarium?

Jean Charles Galissard de Marignac, a Swiss chemist, was the first to observe it.


Paul-Émile Lecoq de Boisbaudran, a French chemist, was the first to isolate samarium from the mineral samarskite

How was Samarium discovered?

Paul-Émile Lecoq de Boisbaudran noticed that it was being absorbed by a mineral he was studying and there was no match for the element.
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Applications and Uses

Element Uses

-Magnets used in higher temperatures

-Reagents and medicines

-Headphones

Isotopes

Sm 149 has been used in a filter for dividing thermal neutrons

Sm 153 is used for lessening bone pain

Compounds

Mixed with carbon makes carbon lights

Fun Facts

Name and Symbol

Name comes from samarskite which is where the element was first discovered.

Other Info

Little is known about the toxicity and it should be handled with care


It costs $5 per gram

Photo Sources

Sources

Element Card: Gray, Theodore W. (2008). The Photographic Card Deck of the Elements.


Elements Book: Gray, Theodore W. (2009). The Elements: A visual exploration of every known atom in the universe. New York: Black Dog & Leventhal Publishers, Inc.


Jefferson Lab: <http://education.jlab.org/itselemental/ele062.html>.



Los Alamos National Laboratory: <http://periodic.lanl.gov/62.shtml>.


Royal Society of Chemistry: http://www.rsc.org/periodic-table/element/62/samarium


http://periodictable.com/Elements/062/index.html