An overview about the chemical element Samarium
By: Melanie Grimes
The element Samarium is a rare earth metal, and a member of the lanthanide family. The atomic number for samarium is 62. Its symbol is Sm. It was discovered in 1879 in Paris France by Lecoq de Boisbaudran. It was named after a Russian mine...
An overview about the chemical element Neodymium
By: Melanie Grimes
Neodymium is a member of the lanthanide family of elements. Its chemical symbol is Nd. Its atomic number is 60 and it was discovered in 1885 in Austria by Carl F.Auer von Welsbach. Its name means new twin, from the words of neo-and didymos...
An overview about the chemical element Praseodymium
By: Melanie Grimes
The element praseodymium is a member of the rare earth elements and one of the lanthanides. It is one of the most refractory substances known. Its atomic number is 59 and its symbol is Pr. It was discovered in 1885 in Austria by Carl F...
An overview about the chemical element Boron
By: Melanie Grimes
Boron was named from borax, the mineral that contains boron in large quantities. It is a component of the gemstone tourmalines. It was discovered by the French chemists Joseph-Louis Gay-Lussac and Louis-Jaques Thnard in 1808, the same year that it was also discovered by the...
By: Tenebris
All black holes are caused by gravitational collapse. Such collapse can be best understood at the stellar level. However, there is nothing which contradicts the possibility that black holes could be of any size, from hundreds of thousands of stellar masses to subatomic.The most...
By: Cyrus Irani
Boyle's law states that if the temperature of a gas is kept constant, the pressure if the gas is inversely proportional to the volume. Which suggests that in an ideal situation where the temperature does not change, if either the pressure or volume is increased...
Space Travel a Lie
By: Gayle Jackson
Another memory challenged. I will never forget watching the moon landing that July in my aunt's basement. We were visiting in Indiana and gathered in front of the black and white TV. It was a monumental moment and a giant step for me.I've also...
By: Sandra Elmore
Over the years there have been many UFO ( unidentified flying object ) sightings in the United States making it not unusual to hear about the sightings and reports although recently in the last month there have been hundred and sixty four reported sightings throughout...
Recent UFO sightings in the US
By: Kimberly Ward
UFOs, are they real and are people really seeing them? This is the million dollar question. In my opinion, ABSOLUTLY! Well let's face it, what does UFO really mean? UFO means Unidentified Flying Object, which tells me that if you see an object flying in...
What causes black holes
By: Martin W. Schwartz
Because there are four different types of black holes, there is no single cause for these phenomena. Basically, a black hole is a region of space where the gravitational field has become so strong that virtually nothing can escape from its grasp, not even the...

 

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