Pi bonds are weaker than sigma bond why? Sigma bond is a type of covalent bond which forms when two valence orbitals of two atoms overlap head-to-head along the co-linear axis while forming molecules. Pi bond forms when two valence orbitals of two atoms overlap sideways along the intermolecular axis while forming molecules. The electron … Read more
Why different spectrum for different element? Each element has a different atomic spectrum. The production of line spectrum by the atoms of an element indicate that an atom can radiate only a certain amount of energy. This leads to the conclusion that bound elections cannot have just any amount of energy but only a certain … Read more
Define quantum number The size of an electron orbit, the shape of the orbit, orientation of orbitals in the magnetic field and the spin of electrons about their own axis are characterized by some numbers which are called quantum numbers.
What is the reason for stability of colloid? The brownian movement of the colloidal particles help in giving the stability of the colloid. For this kind of motion, the particles move randomly and as a consequence the probability of the particles coming closer gets low and they can not conjugate. So the main reason for … Read more
What is orbital? The region around the nucleus where the probability of finding revolving and fixing energy electron cloud is 90 – 95%, that region of electron cloud is called orbital.
What are the negative effects of using chemicals? Chemicals are used for different experiments in chemistry. But they can be harmful to humans and the environment when they are not properly used. i) Chemicals are used to keep fish and meat fresh and ripen fruits which is harmful to health. ii) Preservatives are used to … Read more
What is the periodic table? The periodic table is a tabular arrangement of chemical elements, organized on the basis of their atomic number, electron configurations, and recurring chemical properties. The structure of the table shows periodic trends. The seven rows of the table, called periods, generally have metals on the left and nonmetals on the … Read more
Who was the first scientist to hold a chemistry experiment in a laboratory? a) Democritus b) Antoine Lavoiser c) Jabir Ibnay Hiyan d) John Dalton Answer: c) Jabir Ibnay Hiyan