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An element has electronic configuration ...

An element has electronic configuration as `1s^(2),2s^(2)2p^(6),3s^(2)3p^(6),4s^(2),3d^(7)`.
Correct statement regarding element is:

A

Element must be Co

B

Element belongs to group number '9' according to the long form of periodic table

C

Maximum number of electrons in element having `m = +1` are 6

D

Element has magnetic moment `sqrt(15)BM`

Text Solution

Verified by Experts

The correct Answer is:
A, B, C, D
`mu = sqrt(n(n+2))`, number of unpaired `e^(-) = 3`
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GRB PUBLICATION-PERIODIC TABLE-Multiple Objective Type
  1. An element belongs to 3rd period and group-13 of the periodic table. W...

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  2. Which of the following statements are correct?

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  3. Which of the following statements (s)is/are true?

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  4. Which of the following statement(s) is/are true for IA elements?

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  5. The process(es) requiring the absorption of energy is/are:

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  6. Predict block of element whose outer electron set of quantum number n,...

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  7. Which of the following are neutral oxide?

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  8. Which of the following statement(s) is/are correct?

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  9. In which of the following pairs, the first atom is larger than the sec...

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  10. Among the given elements, select those, which are not at the peack of ...

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  11. An element has electronic configuration as 1s^(2),2s^(2)2p^(6),3s^(2)3...

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  12. The correct order of radii is:

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  13. Choose the correct statement.

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  14. Which of the following pair of elements are not of same group of perio...

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  15. Which of the following statements are incorrect?

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  16. Which of the following processes involve absorption of energy?

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  17. In which of the following arrangements the order which is correct acco...

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  18. which of the following order of ionisation energy is correct?

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  19. Which of the following statements is/are correct?

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  20. Which of the following are endothermic process?

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