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einsteinium

Pronunciation: in-stin'e-um

Definition: An artificially prepared transuranium element, atomic no. 99, atomic wt. 252.0; it has many isotopes, all of which are radioactive (252Es has the longest known half-life, 1.29 years).

[Albert Einstein]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.

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