Q. Electron number from 2nd to 9th are present in same shell because the change in ionization is

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Q. The big jump in the value of ionization energy tends to cause the removal of second electron with

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Q. The ionization energy in the outermost shell of electron (e⁻) is

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Q. The smallest particle of an element which can take part in any chemical change is known as a/an

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Q. Chemical elements are represented by Greek or Latin

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Q. A hydrogen atom has an approximate diameter of

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Q. Every substance in our world is made up of

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Q. By chemical means, chemical elements cannot be broken down into

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Q. Elements which are found on their own as free elements are

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Q. 1.67x10⁻²⁷ kg is the weight of a single atom of

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Q. The most composition of sun is mainly

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Q. Chemical elements contains only

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Q. Losing a small molecule from the original organic molecule is

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Q. During the elimination reaction of Halogenoalkanes, the reagent used is

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Q. If ethanol will be used in the elimination reaction of Halogenoalkanes it will produce

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Q. The enthalpy change of vaporization is lowest for

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Q. Metals are good conductors due to

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Q. What is true about metal atoms?

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Q. The attractive forces between metal ions and delocalized electrons can be made weaker only at

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Q. Covalent solids are

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