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Assertion: Atomic size of silver is almo...

Assertion: Atomic size of silver is almost equal to that of gold.
Reason: d-subshell has low penetration power and produce poor shielding.

A

If both assertion and Reason are true and the Reason is the correct explanation of the assertion.

B

If both assertion and Reason are true but the reason is not the correct explanation of the assertion

C

If assertion is true but reason is false

D

If both assertion and reason are false.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze the assertion and the reason provided. ### Step-by-Step Solution: 1. **Understanding the Assertion**: - The assertion states that the atomic size of silver (Ag) is almost equal to that of gold (Au). - To verify this, we need to look at their electronic configurations and understand the factors affecting atomic size. 2. **Electronic Configurations**: - Silver (Ag): The electronic configuration is [Kr] 4d^10 5s^1. - Gold (Au): The electronic configuration is [Xe] 4f^14 5d^10 6s^1. - Both elements are in the same group (Group 11) of the periodic table, which typically shows a trend of increasing atomic size down the group. 3. **Understanding the Reason**: - The reason states that the d-subshell has low penetration power and produces poor shielding. - This is important because the shielding effect influences the effective nuclear charge felt by the outermost electrons, which in turn affects atomic size. 4. **Analyzing Shielding and Penetration**: - The 4f orbitals in gold are more effective at shielding the outer 6s electrons from the nucleus than the 4d orbitals in silver. - This poor shielding effect from the 4f orbitals in gold leads to a stronger effective nuclear charge acting on the outermost electrons, causing the atomic size of gold to be smaller compared to what would be expected if only considering the number of electrons. 5. **Conclusion**: - The assertion that the atomic size of silver is almost equal to that of gold is true. - However, the reason provided is misleading because it incorrectly attributes the shielding effect to the d-subshell instead of the f-subshell. - Therefore, the assertion is true, but the reason is false. ### Final Answer: - The correct option is: Assertion is true, but the reason is false.
To solve the question, we need to analyze the assertion and the reason provided. ### Step-by-Step Solution: 1. **Understanding the Assertion**: - The assertion states that the atomic size of silver (Ag) is almost equal to that of gold (Au). - To verify this, we need to look at their electronic configurations and understand the factors affecting atomic size. ...
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