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Q. Define Elements and Compounds?
Pure substances are categorized into two categories that are elements and compounds. An element is a substance that can't be separated into simpler substances. Carbon, Oxygen, sulphur, aluminium, iron, and gold are elements. Above 110 elements are known but only 91 take place naturally on Earth. The residue have been created by scientists.
Concentration of electrons in the conduction band At equilibrium, there is no net current flowing across p-n junction. Concentration of electrons in the conduction band in cond
Cyclic or closed-chain compounds Cyclic compounds consist of at least one ring or closed chain of atoms. The compounds along with just only one ring of atoms in the molecule a
the set of numerical coefficients in the equation K2CrO4+HCl=K2Cr2O7+KCl is
in borontriiodide distance between two I atoms is found to be 3.54. if radius of covalent bonded I atom is 1.33. what is covalent radius of boron
How many unpaired electrons are present in cobalt [Co] metal: (1) 2 (2) 3 (3) 4 (4) 7 Ans: 3
examples of the Spontaneous and Non-spontaneous processes
Q. What do you mean by Isomers? Ans. Compounds like butane and 2-methylpropane which have the same molecular formula but different molecular structures are called isomers
Q. Show the Properties of diborane? Diborane is a colourless gas (b. p., 183K). It is rapidly decomposed by water with the formation of H 3 B0 3 and H 2 : B 2 H, + 6H 2 0 -
occurrence of p block elements
Hofmann Method - Determination of Molecular Mass The method is applied to those substances that are not stable at their boiling points, but that may be volatilised with no deco
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