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A table listing the 17 rare-earth elements, their atomic number and symbol, the etymology of their names, and their main usages (see also Applications of lanthanides) is provided here.Some of the rare-earth elements are named after the scientists who discovered or elucidated their elemental properties, and some after their geographical discovery. The distinction between the groups is more to do with atomic volume and geological behavior (see lower down).
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e Harmony has not revealed the number of users affected by the breach, but said less than .05 percent of its member base was impacted.
According to the company's website, 33 million users across all 50 states and 191 countries have joined since the site's inception.
Rare-earth elements are cerium (Ce), dysprosium (Dy), erbium (Er), europium (Eu), gadolinium (Gd), holmium (Ho), lanthanum (La), lutetium (Lu), neodymium (Nd), praseodymium (Pr), promethium (Pm), samarium (Sm), scandium (Sc), terbium (Tb), thulium (Tm), ytterbium (Yb) and yttrium (Y).
Despite their name, rare-earth elements are – with the exception of the radioactive promethium – relatively plentiful in Earth's crust, with cerium being the 25th most abundant element at 68 parts per million, or as abundant as copper.
In response to high-profile cases the International Marriage Broker Regulation Act was passed in 2005.
The law requires that a criminal and marital background check must be run on the man, and provided to the woman in a language she understands.They are not especially rare, but they tend to occur together in nature and are difficult to separate from one another.However, because of their geochemical properties, rare-earth elements are typically dispersed and not often found concentrated as rare-earth minerals in economically exploitable ore deposits.The advice site, a free online community where members can discuss relationship issues, uses separate databases and web servers than the main e Harmony dating site, which was not affected, the online dating giant said in a statement.“e Harmony.com, our matchmaking service, was not hacked as some other reports have incorrectly suggested,” Paul Breton, an e Harmony spokesman, told SCMagazine in an email Friday.The first such mineral discovered was gadolinite, a mineral composed of cerium, yttrium, iron, silicon and other elements.