Q. Elements tend to get 8 electrons in outermost shell ,this is known as

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Q. Electro negativity of hydrogen atom is

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Q. Shielding effect is also called

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Q. Formation of compounds PF₅, SF₆, BCl₃ are not according to rule of

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Q. Ionic radius of metals is formed by

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Q. Atomic radii is determined by measuring distance between centers of adjacent atoms with help of

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Q. Number of stable chemical bonds formed by noble gases is

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Q. A unit difference which shows roughly equal contributions of ionic and covalent bond is

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Q. Energy released when an electron adds to an empty orbital of an isolated gaseous atom is

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Q. Third ionization energy of Mg is

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Q. Arbitrary standard value which is given by fluorine on electro negativity scale is

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Q. Electron affinity is measure of attraction of nucleus of an atom for the

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Q. Electron affinity of halogens is

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Q. Due to increase in nuclear charge pull on electros is increased and size of an atom

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Q. Phase in which, atoms and ions are isolated and are free from all external influences is

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Q. Electron affinity of oxygen atom is

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Q. Metals are solids, except

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Q. Melting point of silica (SiO₂) is

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Q. Potassium Oxide is formed through

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Q. In forming an ionic bond in Potassium Fluoride (KF), Potassium ion (K+)

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