HELIUM

It is a chemical element that has the symbol He, atomic number 2, is a noble gas.In the atmosphere of the sun (helios was first discovered in the spectrum of the solar corona during an eclipse in 1868, though most scientists did not accept it until it was isolated on earth. He is the son of Hyperion and Titaness aunt. is the god of the sun. When the Olympic shifted the power of some gods and Zeus proceeded to share the world among the young gods, Helio is excluded. He stayed on an island called with Rhodes Rhodes and begot seven children.

EUROPIO

Europa (Eu). El europio es un elemento químico de la tabla periódica cuyo símbolo es Eu y su número atómico es 63. El elemento es atractivo para la industria atómica, dado que puede usarse en barras de control y como veneno nuclear. Se ha identificado espectroscópicamente en el Sol y ciertas estrellas.

Información extraída en: http://es.wikipedia.org/wiki/Europio