What is radium

Radium has no color

Radium is nearly pure white. When it is exposed to air, though, it immediately oxidizes, turning black. The heaviest of the alkaline earth metals, radium is a chemical element whose atoms - like those of the other alkaline earth metals - have two electrons in their outermost shell; this causes  ..

Longest and shortest day

Solstice - An astronomical event

The solstices causes the shortest and longest days of the year. A solstice is an astronomical event that happens twice each year, when the tilt of the Earth's axis is most inclined toward or away from the Sun, causing the Sun's apparent position in the sky to reach its northernmost  ..

How is vincent van gogh

Emotionally troubled artist

Birth Year : 1853 Death Year : 1890 Country : Netherlands Vincent van Gogh was a brilliant but emotionally troubled artist who suffered from depression and epileptoid seizures. He spent a particularly prolific and successful year in Arles, France; in October 1888, his friend and fellow painter Paul Gaugin joined him there.  ..