WBJEE · Chemistry · Classification of Elements and Periodicity in Properties
An element \(X\) belongs to fourth period and fifteenth group of the periodic table. Which of the following statements is true?
- A It has completely filled s-orbital and a partialy filled \(d\) -orbital
- B it has completely filled s-and \(p\) -orbitals and a partially filled \(d\) -orbital
- C It has completely filled \(s\) - and \(p\) -orbitals and a hat filled \(d\) -orbital
- D It has a half filled \(p\) -orbital and completely fled s-and \(d\) -orbitals
Answer & Solution
Correct Answer
(D) It has a half filled \(p\) -orbital and completely fled s-and \(d\) -orbitals
Step-by-step Solution
Detailed explanation
The element belonging to 4 th period and 15 th group is arsenic (As). The outer electronic configuration of 15 th group element is \(n s^{2} n \rho^{3}\). Since arsenic belongs to 4 th period, therefore it has filled 'd' orbital too. Thus, the electronic configuration of As is…
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