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Collective name given to the elements wi...

Collective name given to the elements with outer shell configuration `ns^2 np^6` is

A

chalcogens

B

alkaline earths

C

transition elements

D

nobles gas

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The correct Answer is:
D
Chalcogens
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Assign the position of the element having outer electronic configuration (i) ns^(2) np^(2) for n = 2 (ii) (n-1) d^(5) ns^(1) for n = 4 , and (iii) (n-2) f^(14) (n-1) d^(0) ns^(2) for n = 6 in the Modern periodic table.

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Assign the position of the element having outer electronic configuration : (i) ns^(2) np ^(4) for n =3 (ii) (n-1)d ^(2) ns ^(2) for n =4 (iii) (n -2) f ^(7) (n -1) d ^(1) ns ^(2) for n =6 in the periodic table.

DINESH PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-All Questions
  1. The ionic radii of N^(3-) O^(2-), F^-, N^+ follows the order

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  2. In the following, the element with the highest electropositivity is

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  3. Collective name given to the elements with outer shell configuration n...

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  4. In the periodic table, the element with atomic number 16 will be place...

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  5. Ca^(2+) is isoelectronic with

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  6. which of the following configurations represents atoms of the elements...

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  7. Gradual addition of electronic shells in the noble gases causes a decr...

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  8. The correct sequence of elements in the decreasing order of first ioni...

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  9. Which of the following statements is correct?

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  10. The correct order of electron affinity of B , C , N and O is

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  11. Which of the following electronic configurationsis of transition eleme...

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  12. The atomic radius of elements of which of the following series would b...

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  13. With reference to ionisation potential which one of the following sets...

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  14. Which of the following species has the highest ionization potential

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  15. The radii of F,F^(-),O and O^(-2) are in the order of

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  16. Which has maximum first ionization potential?

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  17. Which of the following has the smallest size?

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  18. Which of the following elements has the maximum electron affinity ?

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  19. Which of the following order for ionization energy is correct ?

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  20. Which of the following is most electro- negative ?

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