AP EAMCET · Chemistry · d and f Block Elements
Identify the pair of elements in which number of electrons in \((n-1)\) shell is same
- A \(\mathrm{Fe}, \mathrm{Mn}\)
- B \(\mathrm{Zn}, \mathrm{Fe}\)
- C \(\mathrm{K}, \mathrm{Sc}\)
- D \(\mathrm{Mn}, \mathrm{Cr}\)
Answer & Solution
Correct Answer
(D) \(\mathrm{Mn}, \mathrm{Cr}\)
Step-by-step Solution
Detailed explanation
1. Fe electronic configuration \(=\left[\mathrm{Fe} \Rightarrow 1 \mathrm{~s}^2 2 \mathrm{~s}^2 2 \mathrm{p}^6 3 \mathrm{~s}^2\right.\) \(\left.3 \mathrm{p}^6 4 \mathrm{~s}^2 3 \mathrm{~d}^6\right]\) Here \((n-1)\) shell is \(3 d\) which have 6 electron. 2. mn electronic…
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