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One element has atomic weight 39. Its el...

One element has atomic weight 39. Its electronic configuration `1s^(2) , 2s^(2) , 2p^(6) , 3s^(2) , 3p^(6) , 4s^(1)` . The true statement for that element is :

A

High value of IE

B

Transition element

C

Isotone with `""_(18) Ar^(38)`

D

None

Text Solution

Verified by Experts

The correct Answer is:
C
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MOTION-PERIODIC TABLE -Exercise - 4 | Level-II
  1. Moving from right to left in a periodic table, the atomic size is :

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  2. The increasing order of electronegativity in the following elements :

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  3. One element has atomic weight 39. Its electronic configuration 1s^(2) ...

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  4. Number of paired electrons in O(2) molecule is .

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  5. The decreasing size of K^(+) , Ca^(2+) , Cl^(-) & S^(2-) follows the o...

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  6. Which of the following oxide is neutral ?

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  7. Which of the following has the maximum number of unpaired electrons ?

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  8. The following acids have been arranged in order of decreasing acid str...

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  9. The incorrect statement among the following is : (A)

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  10. Which of the following are amphoteric ?

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  11. Li^(+),Mg^(2+),K^(+),Al^(3+) (Arrange in increasing order of radii)

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  12. Anhydrous AlCl(3) is covalent . From the data given below predict whet...

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  13. Which one of the following statement (s) is (are) correct ? (A) Th...

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  14. Statement-1 : F arom has a less negative electron gain enthalpy than C...

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  15. Al(OH)(3) is amphoteric is nature. Al-O and O-H bonds can be borken ...

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  16. The correct order of radii is

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  17. The correct order of acidic strength is

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  18. The IE(1) of Be is greater than that of B. [T/F]

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  19. The set representing correct order of IP(1) is

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  20. Identify the least stable ion amongst the following:

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