Q. The atomic radius of helium in pm is

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Q. transfer of electrons from higher energy state to a lower energy state is responsibility of

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Q. Elements having high ionization energies are

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Q. Increase in atomic radii in a group is due to increase in number of

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Q. Atomic number of chromium is

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Q. Fluorine is most

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Q. In period from left to right ionization energy is

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Q. Values of group IIA, VA and VII in every period is

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Q. Distance of 75.4 pm, where attractive forces dominate repulsive forces, that distance is called

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Q. Number f electrons in valence shell of noble gases is

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Q. atomic number of nitrogen is

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Q. When two atoms come close to each other due to attractive forces then potential energy of system is

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Q. When force of attraction decreases less energy is used in electron

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Q. Stable noble gas which lies near to S is

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Q. Energy involved in bond formation is

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Q. From left to right in a period, atomic radii

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Q. First ionization energy of K is

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Q. Ionization energy which is required to remove an electron after removal of first electron, is

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Q. Force of attraction in a crystal lattice which held positive and negative ion together is

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Q. Distance between potassium chloride is equal to sum of radii of two ions, it is determined by

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