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Question

Electronic configuration [Kr]4d10 belongs to:

A
Period(4) Group(10) Block(d)
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B
Period(5) Group(12) Block(d)
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C
Period(5) Group(10) Block(d)
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D
Period(4) Group(12) Block(d)
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Solution

The correct option is A Period(4) Group(10) Block(d)
  1. Here the outermost electron enters into the Nshell i.e n=4 hence the it belongs to 4th period.
  2. The outermost electron enters into the d orbital hence it belongs to d block.
  3. For d-block elements no. of group= no. of (n1)delectrons + no. of electrons in nth shell=10+0=10

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