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Describe the Theory Associated with the Radius of an Atom as It Loses an Electron. - CBSE (Science) Class 11 - Chemistry

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Question

Describe the theory associated with the radius of an atom as it loses an electron.

Solution 1

When an atom loses an electron, the number of electrons decreases by one while the nuclear charge remains the same. Therefore, the interelectronic repulsions in the atom decrease. As a result, the effective nuclear charge increases. Hence, the radius of the atom decreases.

Solution 2

Loss of an electron from an atom results in the formation of a cation. A cation is smaller than its parent atom because it has fomer electrons while its nuclear charge remains the same. For example, The atomic radius of sodium (Na) is 186 pm and atomic radius of sodium ion (Na+) = 95 pm

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APPEARS IN

 NCERT Solution for Chemistry Textbook for Class 11 (2018 to Current)
Chapter 3: Classification of Elements and Periodicity in Properties
Q: 24.2 | Page no. 94
Solution Describe the Theory Associated with the Radius of an Atom as It Loses an Electron. Concept: Periodic Trends in Physical Properties of Elements - Electron Gain Enthalpy.
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