Carbon dioxide It is a colorless gas that has a density of about 60% higher than dry air. Its chemical formula is CO2. Carbon dioxide consists of a carbon atom that is double bonded to two oxygen atoms collectively. It occurs...
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...
Covalent bonding, also called atomic bonding, is a chemical bond that shares electron pairs between atoms. These electron pairs are called shared pairs or bond pairs, and the constant equilibrium of attractive and repulsive forces between atoms, when they share electrons,...
Hydrogen It is a chemical element whose atomic number 1 and its symbol is H. It has a standard atomic weight of 1.008, which means it is the lightest element in the periodic table. Hydrogen is the most common chemical element...
Carbon 13 Carbon 13 (13c) is a natural, stable isotope of carbon with a nucleus consisting of six protons and seven neutrons. As one of the environmental isotopes, it constitutes 1.1% of all-natural carbon on Earth. Carbon 13 Detection by mass...
Periodic Table Periodic Table, also called a table of chemical elements, arranged by atomic number, electron configuration, and repeating chemical properties. The structure of the periodic table shows periodic trends. The seven rows of the table, called Periods, are usually the...