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Electronic configuratios of four element...

Electronic configuratios of four elements `A, B, C` and `D` are given below:
(i) `1s^(2)2s^(2)2p^(6)` (ii) `1s^(2)2s^(2)2p^(4)` (iii) `1s^(2)2s^(2)2p^(6)3s^(1)` (iv) `1s^(2)2s^(2)2p^(5)`
Which of the following is the correct order of increasing tendency of gain electron:

A

AltCltBltD

B

AltBltCltD

C

DltBltCltA

D

DltAltBltC

Text Solution

AI Generated Solution

The correct Answer is:
To determine the correct order of increasing tendency to gain electrons for the elements A, B, C, and D based on their electronic configurations, we will analyze each configuration step by step. ### Step 1: Identify the electronic configurations - Element A: `1s² 2s² 2p⁶` (Noble gas configuration, stable) - Element B: `1s² 2s² 2p⁴` (Has 2 electrons in the p orbital) - Element C: `1s² 2s² 2p⁶ 3s¹` (Has 1 electron in the 3s orbital) - Element D: `1s² 2s² 2p⁵` (Has 1 electron less than a noble gas configuration) ### Step 2: Analyze the stability and tendency to gain electrons - **Element A**: This element has a complete outer shell (noble gas configuration). It is very stable and has little to no tendency to gain electrons. Thus, it has the lowest electron gain enthalpy. - **Element D**: This element has a configuration of `2p⁵`, which is one electron short of a full p subshell (which would be `2p⁶`). It has a high tendency to gain one electron to achieve a stable noble gas configuration. Therefore, it has a high tendency to gain electrons. - **Element B**: This element has a configuration of `2p⁴`, which means it needs two more electrons to achieve a stable configuration. It has a moderate tendency to gain electrons, but less than D. - **Element C**: This element has a configuration of `3s¹`, which means it has one electron in the outermost shell. It is more likely to lose this electron to achieve stability rather than gain electrons. Therefore, it has a lower tendency to gain electrons compared to B and D. ### Step 3: Order the elements based on their tendency to gain electrons Based on the analysis: 1. A (lowest tendency to gain electrons) 2. C (lower tendency to gain electrons) 3. B (moderate tendency to gain electrons) 4. D (highest tendency to gain electrons) ### Final Order The correct order of increasing tendency to gain electrons is: **A < C < B < D**
To determine the correct order of increasing tendency to gain electrons for the elements A, B, C, and D based on their electronic configurations, we will analyze each configuration step by step. ### Step 1: Identify the electronic configurations - Element A: `1s² 2s² 2p⁶` (Noble gas configuration, stable) - Element B: `1s² 2s² 2p⁴` (Has 2 electrons in the p orbital) - Element C: `1s² 2s² 2p⁶ 3s¹` (Has 1 electron in the 3s orbital) - Element D: `1s² 2s² 2p⁵` (Has 1 electron less than a noble gas configuration) ...
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