Isotopes, Isobar & isotone
Isotopes: It has been observed that many elements have nuclei which contain the same number of protons but different number … Read more
Class 11
Discovery of neutron
Discovery of Neutron: In 1932, Sir James Chadwick discovered the third subatomic particle. He directed a stream of alpha particles … Read more
Discovery of proton
Positive Rays: In 1886, Eugen Goldstein used a discharge tube with a hole in the cathode. He observed that while … Read more
Environmental Chemistry
Environmental Chemistry: The branch of science which deals with the chemical phenomena occurring in the environment is called environmental science. … Read more
Aromatic hydrocarbon/benzene
Aromatic Hydrocarbons: Benzene has a cyclic, planar, hexagonal structure. All carbon-carbon bond lengths are identical and are intermediate between C—C … Read more
Aromaticity/hydrocarbons
Resonance: The phenomenon in which two or more structures can be written for a substance which involves identical positions of … Read more
Properties of alkynes
Physical Properties: The first three members are gases, next eight members are liquids and the higher alkynes are solids. They … Read more
Alkyne/hydrocarbons
Alkyne: An alkyne contains two hydrogen atoms less than the corresponding alkene. It is characterized by the presence of a … Read more