How many periods are in the periodic table?Each horizontal row of elements in the Periodic Table is known as a period.The Periodic Table consists of seven periods, from Period 1 to Period 7.Table shows the changes in the proton numbers and number of val…

What causes ions to form ionic bonds? An ionic bond is formed when a metal combines with a non-metal to produce a compound.The compound formed is called an ionic compound. Metal + Non-metal → Ionic compoundThe ionic bond is formed through the transfer of…

What is One Mole and How many Particles are in a Mole?The Mole and the Number of ParticlesOne mole is defined as the amount of substance that contains as many particles as the number of atoms in exactly 12 g of carbon-12, which is 6.02 × 1023 particles. …

Classification of SaltsWhat is a salt?A salt is formed in a neutralisation reaction between an acid and a base. Salt is a general term used for the substances that are formed when an acid and a base react with each other. This reaction is called a neutra…

How does Temperature Affect the Movement of ParticlesEffect of Temperature Change By increasing the temperature (by heating), a solid can be converted into the liquid state; and the liquid can be converted into a gaseous state (or vapour state). And by d…

Explain Bohr Bury rules for Distribution of Electrons into Different ShellsElectron distribution The distribution of electrons in different orbits or shells is governed by a scheme known as Bohr bury scheme.The arrangement of electrons in various energy…

What are the types of Pure substances and MixturesAll the matter around us is not pure. The matter around us is of two types. In the previous chapter, we have learnt about the three states of matter. Before, understanding the chemical nature of matter, …

What was Rutherford’s Original HypothesisRutherford model of an atom Rutherford and his co-workers made a fundamental contribution in understanding the structure of the atom and establishing the presence of a small nucleus in the atom. They performed a…

How can we separate a mixture of two miscible liquidsSeparation of mixture of two or more liquid   All the mixtures containing two (or more) liquids can be separated by the following two methods:By the process of fractional distillation.By using a separa…

What is the Hybridization of the Carbon atoms in Acetylene sp HybridisationEach carbon is only joining to two other atoms rather than four (as in methane or ethane) or three (as in ethene). Here the carbon atoms hybridise their outer orbitals before for…