Mindblown: a blog about philosophy.

  • Classification of Modern Periodic Table

    The modern periodic table is also classified into metals, non-metals and metalloids. Metals Metals are electropositive as they form bonds by losing electrons. In general cases, oxides of metals are basic in nature. Examples: Includes iron, copper, silver, mercury, lead, aluminum, gold, platinum, zinc, nickel and tin. Non-metals Nonmetals are electronegative as they form bonds…

  • Groups in Modern Periodic Table

    The modern periodic table contains 18 vertical columns known as groups. Group 1 elements are known as alkali metals.Group 2 elements are known as alkaline earth metals.Group 15 elements are known as pnicogens.Group 16 elements are known as chalcogens.Group 17 elements are known as halogens.Group 18  elements are known as noble gases. Alkali Metals The…

  • Periods in Modern Periodic Table

    Elements present in the same period have the same number of shells which is equal to the period number. A period is a row of the periodic table that is horizontal. The periodic table contains seven periods, each of which starts at the left. On moving from left to right in a given period, the number of…

  • Modern Periodic Table

    In the past, scientists believed that an element’s qualities were periodic functions of its atomic mass. Mendeleev arranged 63 elements in a vertical column named groups and horizontal rows called periods based on this idea. This approach was disregarded since it was unable to account for the locations of several elements, rare earth metals, and…

  • Mendeleev`s Periodic Table and Law

    The physical and chemical characteristics of elements are a periodic function of their atomic masses, in accordance with Mendeleev’s Periodic Law. Mendeleev organised the elements in ascending order of their atomic masses after classifying them according to their atomic masses. The physical and chemical properties of elements are periodic functions of their atomic weights. Features…

  • Early Models of Periodic Table

    Dobereiner’s Triads Dobereiner arranged a group of three elements with similar properties in the order of increasing atomic masses and called it a triad. He showed that the atomic mass of the middle element is approximately the arithmetic mean of the other two. But, Dobereiner could identify only the following three triads from the elements known at that time.…

  • Introduction

    Periodic element classification is the process of categorizing the elements into various classes. This strategy involves grouping like things together and separating those that are unrelated by comparing the characteristics of several elements. It aids in our comprehension of how various compounds combine to form various elements. Without the classification of elements, it would be…

  • Hard Water

    Hard water contains salts of calcium and magnesium, principally as bicarbonates, chlorides, and sulphates. When soap is added to hard water, calcium and magnesium ions of hard water react with soap forming insoluble curdy white precipitates of calcium and magnesium salts of fatty acids. 2C17H35COONa+MgCl2 → (C17H35COO)2Mg+2NaCl2C17H35COONa+CaCl2 → (C17H35COO)2Ca+2NaCl These precipitates stick to the fabric being washed…

  • Soaps and Detergents

    Cleansing Action of Soap When soap is added to water, the soap molecules uniquely orient themselves to form spherical shape micelles. The non-polar hydrophobic part or tail of the soap molecules attracts the dirt or oil part of the fabric, while the polar hydrophilic part or head,(−COO−Na+, remains attracted to water molecules. The agitation or scrubbing…

  • Ethanol and Ethanoic Acid

    Ethanol (i) Ethanol, C2H5OH is a colourless liquid having a pleasant smell.(ii)   It boils at 351 K.(iii)  It is miscible with water in all proportions.(iv)  It is a nonconductor of electricity (it does not contain ions)(v)   It is neutral to litmus. Uses: 1. As an antifreeze in radiators of vehicles in cold countries.2. As a solvent…

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