Used in making camera lenses and optical instruments due to its high refractive index.
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Protons, Neutrons, Electrons, Isotopes, Isobars. chemistry notes ssc
Energy released when an electron is added. Increases across a period, decreases down a group. Chlorine has the highest electron affinity.
. Below is a review of the typical content structure and key concepts covered in these notes: Core Topics & Content Review Used in making camera lenses and optical instruments
Focus on the first 20 elements, their symbols, atomic numbers, and whether they are metals, non-metals, or noble gases.
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Atoms of the same element with the same atomic number but different mass numbers (e.g., Protium 1Hto the first power cap H , Deuterium 2Hsquared cap H 3Hcubed cap H
Introduced by , the pH scale measures acidity or alkalinity ranging from 0 to 14. : Neutral (Pure water) : Basic/Alkaline Common Chemical Indicators Color in Acid Color in Base Litmus Paper Blue turns Red Red turns Blue Phenolphthalein Methyl Orange Important Acids in Nature Citric Acid: Citrus fruits (lemons, oranges) Tartaric Acid: Tamarind, grapes Oxalic Acid: Tomatoes (used to remove ink stains) Lactic Acid: Sour milk, curd Formic Acid (Methanoic acid): Ant stings Acetic Acid: Vinegar 6. Metals, Non-Metals, and Metallurgy