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Isotopes – Isotopes of Hydrogen, Uranium Carbon and Chlorine

ISOTOPES: The atoms of an element that have same atomic number but different mass number are known as isotopes. “OR” The atoms of an element that have same number of protons and electrons but different number of neutrons are called isotopes. “OR”  Atoms of the same element having same chemical properties but different chemical properties are called isotopes. …

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ELECTRONIC CONFIGURATION

ELECTRONIC CONFIGURATION: The distribution or arrangement of electrons around the nucleus in various shells and sub shells according to their increasing energy is called electronic configuration. Explanation: The electrons fill the shells in order of their increasing energy that is lower energy level is occupied first then the higher energy level and so on.

DIFFERENCE BETWEEN RUTHERFORD ATOMIC MODEL AND BOHR’S ATOMIC MODEL – Short Note

DIFFERENCE BETWEEN RUTHERFORD ATOMIC MODEL AND BOHR’S ATOMIC MODEL: Rutherford model  Bohr model 1) It was based upon classical theory.  It was based upon quantum theory. 2) electrons revolve around the nucleus. Electrons revolve around the nucleus in orbits of fixed energy. 3) No idea about orbits was introduced. Orbits had angular momentum. 4) Atom …

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PLANETRY MODEL OF AN ATOM

RUTHERFORD’S ATOMIC MODEL OR PLANETRY MODEL OF AN ATOM OR GOLD FOIL EXPERIMENT OR DISCOVERY OF NUCLEUS: In order to determine the structure of an atom, Rutherford carried out Gold Foil experiment in year 1911.He bombarded alpha-particles on 0.00004cm thick gold foil. Alpha-particles are emitted from radioactive elements like Radium and Polonium.

Discovery of Neutrons

In 1920 Rutherford predicted the existence of neutral particle in an atom. In 1932 James Chadwick bombarded alpha particles on the nucleus of beryllium. It produced neutral particles having mass equal to proton and carry no charge. These particles were named as neutrons.

State the reasons: soft drink is a mixture and water is a compound

Soft drink is formed by simple mixing of water, CO2 and sugar while water is formed by chemical combination of hydrogen and oxygen. Components of soft drink can be easily separated by physical means while components of water can not be separated by physical means. Components of soft drink has no fixed ratio by mass while …

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Types of Molecule

Molecule: The smallest component of a substance (an element or a compound) that can exist independently or freely in nature is called a molecule. A molecule is  mostly formed by the chemical combination of atoms. It is the smallest unit of a substance. It shows all the properties of the substance and can exist independently.