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Europium is a chemical element; it has symbol Eu and atomic number 63. It is a silvery-white metal of the lanthanide series that reacts readily with air to form a dark oxide coating. Europium is the most chemically reactive, least dense, and softest of the lanthanides. It is soft enough to be cut with a knife.
A currency symbol or currency sign is a graphic symbol used to denote a currency unit. Usually it is defined by a monetary authority, such as the national central bank for the currency concerned. A symbol may be positioned in various ways, according to national convention: before, between or after the numeric amounts: €2.50 , 2,50€ and 2 50 .
Typographical symbols and punctuation marks are marks and symbols used in typography with a variety of purposes such as to help with legibility and accessibility, or to identify special cases. This list gives those most commonly encountered with Latin script. For a far more comprehensive list of symbols and signs, see List of Unicode characters.
In Europe, the most commonly used currency is the euro (used by 26 countries); any country entering the European Union (EU) is expected to join the eurozone [1] when they meet the five convergence criteria. [2] Denmark is the only EU member state which has been granted an exemption from using the euro. [1]
The European Union (EU) uses a number of symbols, including the Flag of Europe, Anthem of Europe, Motto of the European Union and Europe Day. These symbols have no official status based in the EU treaties , but they are in de facto use by the EU institutions and are in widespread use as expressions of the political ideologies of Pan-Europeanism ...
Europium is exempt of this classification as it has two valence states: Eu 2+ and Eu 3+. [29] Yttrium is grouped as heavy rare-earth element due to chemical similarities. [30] The break between the two groups is sometimes put elsewhere, such as between elements 63 (europium) and 64 (gadolinium). [31]
Capital within the EU may be transferred in any amount from one state to another. All intra-Union transfers in euro are treated as domestic transactions and bear the corresponding domestic transfer costs. [55] This includes all member states of the EU, even those outside the eurozone providing the transactions are carried out in euro. [56]
Naturally occurring europium (63 Eu) is composed of two isotopes, 151 Eu and 153 Eu, with 153 Eu being the most abundant (52.2% natural abundance).While 153 Eu is observationally stable (theoretically can undergo alpha decay with half-life over 5.5×10 17 years), 151 Eu was found in 2007 to be unstable and undergo alpha decay. [4]