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Manganese & Einsteinium
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Einsteinium is radioactive rare earth metal named after Albert Einstein. It is of no commercial importance and only a few of its compounds are known.

Exposure to manganese dusts, fume, and compounds should not exceed the ceiling value of 5mg/m for even short periods because of the elements toxicity level.

Manganese (Mn) is essential to iron and steel production by virtue of its sulfur-fixing, deoxidizing, and alloying properties.   Steelmaking, including its ironmaking component, accounts for most domestic manganese demand, presently in the range of 85% to 90% of the total.   Manganese ferroalloys, consisting of various grades of ferromanganese and silicomanganese, are used to provide most of this key ingredient to steelmaking.   Products for construction, machinery, and transportation are leading end uses of manganese.  Manganese also is a key component of certain widely used aluminum alloys and, in oxide form, dry cell batteries. As ore, additional quantities of manganese are used for such nonmetallurgical purposes as plant fertilizers, animal feed, and colorants for brick.

Einsteinium was discovered by a team of scientists led by Albert Ghiorso in 1952 while studying the radioactive debris produced by the detonation of the first hydrogen bomb. The isotope they discovered, einsteinium-253, has a half-life of about 20 days and was produced by combining 15 neutrons with uranium-238, which then underwent seven beta decays. Today, einsteinium is produced though a lengthy chain of nuclear reactions that involves bombarding each isotope in the chain with neutrons and then allowing the resulting isotope to undergo beta decay.

A poem about...
 
Einsteinium
by  Joe Davis

Einsteinium must have been named after Einstein

Inventor of many things and discoverer of even more

Nuclear energy and the nuclear bomb

So was space and the meaning of it

Two hundred and fifty four is the R.A.M. of Einsteinium

Einsteinium is the 99th element in the periodic table

It is in the f-block along with :

Nobelium, thorium, fermium

It is also with

Uranium and

Mendelevium