Last Updated on February 16, 2025 by Chirag Gupta Metal and Non-metal question answer are provided in this post including NCERT questions also. 1. Give an example of a metal which :(i) is a liquid at room temperature.(ii) can be easily cut with a knife.(iii) is the best conductor of heat.(iv) is a poor conductor […]
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Last Updated on February 16, 2025 by Chirag Gupta The short notes for the chapter Metals and Non-metals are as follows: Metals and Non Metals There are 92 well known naturally occurring minerals of which 70 are metals and rest 20 are the non-metals. Physical Properties of Metals and Non Metals Property Metals Non-Metals Luster
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Last Updated on February 16, 2025 by Chirag Gupta In this post you will learn about valence electrons and valency, isotopes, isobars and fractional atomic masses of certain elements. What are valance electrons? The electrons in the outermost shell of an atom take part in all the chemical reactions given by that element. Thus, these
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Last Updated on February 16, 2025 by Chirag Gupta Acids Bases and Salts question answers are provided in this post including NCERT questions also. 1. You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are
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Last Updated on February 16, 2025 by Chirag Gupta In this post we will discuss about Bohr’s model of an atom, Bohr-Bury scheme, how to write electronic configuration of an element and nuclear composition. Rutherford’s nuclear model of atom, although a great contribution to the science, could not explain certain observations. A brilliant description of
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Last Updated on February 16, 2025 by Chirag Gupta In this post we will discuss about Rutherford and Thomson Model of an atom. After the discovery of electrons and protons, Sir J.J. Thomson proposed the atomic model. This is described below. What is J J Thomson Model of the atom? In 1898, Sir J J
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Last Updated on February 16, 2025 by Chirag Gupta The short notes for the chapter Acids Bases and Salts are as follows: Acids Acids are the one which: Produce [H+] in H2O Has sour taste Turns blue litmus red Acts as electrolyte in solution Chemical Properties Of Acids Acids + Metal → Salt + H2e.g.,
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Last Updated on February 16, 2025 by Chirag Gupta In this post, we will discuss about the anode rays and the discovery of proton and neutron. Anode Rays (Positive Rays or Canal Rays) During his working with cathode rays, Sir J J Thomson had noticed a red glow around the cathode, but on the side
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Last Updated on February 16, 2025 by Chirag Gupta This post includes the topics of Class 9 Chapter 4 Structure of Atom, i.e., Cathode rays and the JJ Thomson model and the discovery of electron. Atoms are too small to be seen even with the most powerful microscope and, too light to be weighed even
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Last Updated on February 16, 2025 by Chirag Gupta Substitution reaction is the basic types of organic reaction which possess primary importance in the field of organic chemistry. What is substitution reaction? This reaction is defined as a reaction in which the functional group of one chemical compound is substituted by another group or it
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