Alkali metals: They are members of Group I of the periodic table. They are very reactive metals and do not occur freely in nature. These metals have only one electron in their outer shell. The alkali metals include: Lithium (Li), Sodium (Na), Potassium (K), Rubidium (RB), Cesium (Cs), and Francium (Fr). Alkaline Earth metals: They are members of … [Read more...] about Groups in the Periodic Table
Science
Atomic Number & Periodic Table
Atomic Number:It is the number of protons found in the nucleus of an atom.It is conventionally represented by the symbol Z.The atomic number uniquely identifies a chemical element. When an atom is in neutral charge, the atomic number is equals to the number of electrons.Isotope:Atoms of the same element having the same number of … [Read more...] about Atomic Number & Periodic Table
Amino Acids
Amino acids are biologically important organic compounds composed of amine (-NH2) and carboxylic acid (-COOH) functional groups, along with a side-chain specific to each amino acid.The key elements of an amino acid are carbon, hydrogen, oxygen, and nitrogen, though other elements are found in the side-chains of certain amino … [Read more...] about Amino Acids
Salt and Double salts
Salt: A salt is the product of reaction between an acid and a base. It can be organic as well as inorganic. They are abundant on the earth’s crust as well as in the oceans e.g. NaCl or Sodium Chloride is deposited in large amounts on earth and ocean water. Double Salt: These are the combination of two simple salts. Unlike simple salts, Double … [Read more...] about Salt and Double salts
How Cells Divide
Cell division : Meiosis and MitosisMitosis is a process of cell duplication or reproduction during which one cell gives rise to two genetically identical daughter cells.Meiosis is a division of germ cells involving two fissions of the nucleus and giving rise to four gametes, or sex cells, each possessing half the number of chromosomes of … [Read more...] about How Cells Divide
Firsts in Space
First man to go into space Yuri Gagarin, RussiaFirst woman to go into space Valentina Vladimirovna Tereshkova, RussiaFirst person to walk in space Lt.Col.Alexei Leonov,USSRFirst Space tourist Dennis Tito, USAFirst woman to walk in space Svetlana Savitskaya, RussiaFirst creature on space Laika, a dogFirst … [Read more...] about Firsts in Space