Online Chemistry Explorer

Atomic Number Atomic number is the total number of protons present in the nucleus of an atom which is represented by  Z . Atom is electrically neutral and hence the charge of a proton is equal but opposite to that of an electron. Since elements tend to lose or gain electrons during the chemical reactions, the number of protons is generally used to represent the atomic number of an element. Atomic Number (Z) = Number of protons in the nucleus of an atom Examples: Hydrogen atomic Number is 1 and it has 1 proton Helium atomic Number is 2 and it has 2 number of Protons Sodium atomic Number is 11 and it has 11 number of Protons Mass Number Mass number (A) is the total number of protons and neutrons present in the nucleus of an atom. Inside the nucleus Protons and neutrons are present which are together called nucleons. So, in other wards we can say that the mass number is the number of nucleons present in an atom. Mass Number (A) = Number of Protons + Number of neutrons Example: Lithiu...

  What is an atom? An atom is the basic building block of matter that cannot be chemically broken.  Atoms organize all kinds of matter; everything you can see and touch. The atom is the  smallest particle into which an element can be divided .  Subatomic particles Atoms consist of three basic particles namely, neutrons, protons and electrons with hydrogen as an exception without neutrons. The nucleus of the atom contains protons and neutrons. It is nuclear energy that makes neutrons and protons stick together. And, nucleus bounds with one or more electrons around it. The protons are positively charged, electrons are negatively charged and neutrons are neutral. Protons, neutrons, and electrons are very small, and most of the volume of an atom is actually empty space.  The number of protons in an atom's nucleus distinguishes one chemical element from another.  When a  chemical reaction  occurs, it is preserved with its original proper...

 How to define Chemistry? The knowledge that humans have developed through observations and experimentation may be stated to as science. Due to its immense development and variety of subjects, science has been further divided into many branches. One of the most significant fields of science is chemistry. Chemistry is the study of the composition, structure, and properties of matter and the processes that matter undergoes. Since living and non-living things are made up of matter chemistry influences all aspects of life. There are Several branches of chemistry as mentioned below. Branches of chemistry 1. Organic chemistry— Study of carbon-containing compounds. (Petroleum, Plastics, biofuels, etc) 2. Inorganic chemistry— Study of organic substances bonded to metals (organometallics, metal alloys, ion batteries, glass, etc) 3. Physical chemistry— Study of the properties and changes of matter and their relation to energy (plasma TVs -  television display technology, energy p...