“When a molecule loss or gain one or more electrons, is called Molecular Ion or Polyatomic ion.” Examples of Polyatomic ions: CH4+, CO+, N2+ etc. Formation of Molecular Ion: Cationic molecular ions are more abundant than anionic Molecular ions. These ions can be generated by passing high energy electron beam or alpha particle…
“A particle carrying either negative or positive charge, is called Ion.” Types of Ions: There are following two types of ions depending upon their nature of charge. Cation Definition: The ion which has positive charge is called Cation. e.g., Na+1, Ba+2, Al+3 etc. A Cation is formed through removal of one or more…
Here in this topic we will discuss definition of molecule in chemistry, molecule examples and properties of molecules. “Smallest particle of elements or compounds which may survive solely is called Molecule.” Composition & Molecule example: It consist of, One atom of the element (monoatomic molecule) E.G., He, Ne, Xe etc. Two atoms of…
The most used definition of atom is as follows, “The smallest particle of an element, which may or may not have an independent existence but can take part in a chemical reaction is called atom.” Explanation of Define Atom: For example, the smallest particle of hydrogen, which does not exist independently is…
According to Greek philosophers, matter is composed of very small particles which cannot be further divided. DEMOCRITUS (460-370BC) named these particles as atoms derived from a Greek word “ATOMOS” which mean indivisible. The ideas of Greek philosophers were not experimental based. In the late 17th century, the quantitative analysis of many substances disclosed that they…
The most comprehensive Melting point Definition is, The temperature at which liquid & solid form of a substance co-exits in equilibrium under given pressure, is called Melting point. Normally standard pressure is taken as 1 atmosphere. In other way, we can also define melting point as, The temperature at which solid phase of a substance…