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The electron configuration of the starti...

The electron configuration of the starting and ending elements of fourth period are

A

`4s^(1)` and `3d^(10) 4s^(2) 4p^(6)`

B

`4s^(1)` and `4s^(2) 3d^(10)`

C

`4s^(2) 3d^(1)` and `4s^(2) 4p^(6)`

D

`4s^(2) 3d^(1)` and `4s^(2) 3d^(10)`

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The correct Answer is:
A
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NARAYNA-PERIODIC TABLE -All Questions
  1. A member of Lanthanide

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  2. Which is wrong about transition metals?

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  3. The electron configuration of the starting and ending elements of four...

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  4. In which of the following period a maximum number of 32 elements are p...

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  5. The element having 18 electrons in its outer most shell is:

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  6. The maximum number of valency electrons possible for atom in the secon...

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  7. The atomic number of an element 'X' is 34. Then it is present in peri...

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  8. The position of element with Z=24 in the periodic table is

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  9. Transition metals exhibit variable oxidation states. It is because of

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  10. The following is the reason for the periodicity in the properties of e...

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  11. The largest atom among the following is

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  12. Atom loses electrons and becomes

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  13. Al^(3+) has low ionic radius than Mg^(2+) because

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  14. Largest particle among the following is

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  15. The increasing order of the ionic radii of the given isoelectronic spe...

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  16. Which of the following is the smallest cation?

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  17. Which of the following is the biggest ion?

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  18. Na^(+), Mg^(2+), Al^(3+), and Si^(4+) are isoelectronic ions. Their io...

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  19. Atomic radius depends upon

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  20. Among elements with the following electromic configurations, the one w...

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