Category: Elements

Radium It is a chemical element with the symbol Ra, and the atomic number of radium is 88. This is the sixth element in group 2 of the periodic table, also known as alkaline earth metals. Pure radium is silver-white, but...

Oxygen What is oxygen? It is a colorless, tasteless, odorless air element that comprises 21 percent of the atmosphere and is found in water, most rocks and minerals, and in many organic compounds. It is capable of mixing with all elements...