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Diagonal Relationship between Beryllium and Aluminium || Relation between Beryllium and Aluminium

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  Diagonal Relationship between Beryllium and Aluminium The ionic radius of Beryllium (Be 2+) is estimated to be nearly 31 pm; the charge/radius ratio Or e/m ratio is nearly the same as that of the Al 3+ ion. Hence beryllium resembles aluminium in these ways. Some of the similarities are given below: » Like Aluminium, Beryllium(be) is not readily attacked by acids H+ donor because of the formation of an oxide film on the surface of the metal by reacting with oxygen, i.e. they are rendered passive by nitric acid. » Beryllium hydroxide[[Be(OH)4]2] dissolves in excess of alkali to give a beryllate ion, [ Be(OH)4]2– just as aluminium hydroxide[Al(OH)3] gives aluminate ion, [Al(OH)4] » The chlorides of metals beryllium and aluminium have Cl– bridged chloride structure in vapour phase. Both the chlorides are soluble in organic solvents and are strong as Lewis acids They are used as Friedel Craft catalysts. » Beryllium(Be) and aluminium(Al) ions have strong tendency to form complexes, (Be...
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Vistas Chapter-2 The Tiger King || Revision Notes Class 12 Board Exams

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Solar System, Planets, Moons, Asteroid Belt,Kuiper Belt and Oort Cloud, Comets and Meteoroids

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 The solar system consists of the Sun, which is a star at its center, and all the celestial bodies bound by its gravitational pull. These bodies include planets, moons, asteroids, comets, and other objects. Key Components of the Solar System: The Sun : The Sun is the center of the solar system and contains about 99.86% of its mass. It is a star primarily composed of hydrogen and helium, providing the heat and light that sustains life on Earth. Planets : There are eight recognized planets in the solar system: Mercury : The closest planet to the Sun, known for extreme temperature variations and no atmosphere. Venus : Similar in size to Earth but with a thick, toxic atmosphere and surface temperatures hot enough to melt lead. Earth : The third planet from the Sun, the only known planet to support life, with water and a breathable atmosphere. Mars : Known as the Red Planet, it has a cold, dry surface and signs of past water. Jupiter : The largest planet, a gas giant, w...
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Newton's third law of motion || Action reaction law || Newton's 3 law || Contact force- Normal force ||

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Newton's third law states that “ EVERY ACTION HAS EQUAL AND OPPOSITE REACTION. ” It is a contact action reaction pair which applies on the two or more different bodies.  There are the following types of contact forces are:- 1. Normal reaction :-  It is a perpendicular force acting at the point of contact between the bodies.  Weight of the body is calculated using Normal reaction.  Direction of Normal is always perpendicular to to the surface in such a way that it tries to compress the body.  Let m be the mass of the body and N is the normal reaction and g is the acceleration due to gravity.  Then -                     N = mg 2. Tension :-  This forces are mainly seen in strings. It is a action reaction force which act in opposite directions. 
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Test and Measurement in Sports Case Study Based Questions Chapter 6 Class 12 Physical education

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