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In the sixth period, the orbitals being ...

In the sixth period, the orbitals being filled with electrons are

A

5ss, 5p, 5d

B

6s, 6p , 6d, 6f

C

6s, 5f , 6d, 6p

D

6s, 4f, 5d, 6p

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The correct Answer is:
D
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In the 5^th period the orbitals being filled are

Numerous forms of the periodic table have been devised from time to time. A modern version which is most convenient and widely used is the long or extended from of periodic table. The aufbau principle and the electronic configuration of atoms provide a theoretical foundation for the periodic classification. The horizontal rows are called periods. There are altogether seven periods. The first period consists of 2 elements. The subsequent periods consists of 8, 8,18, 18 and 32 elements respectively. The seventh period is incomplete and like the sixth period would have maximum of 32 elements. Elements having similar outer electronic configurations in their atoms are grouped in vertical columns. These are referred to as groups or families. According to the recommendations of IUPAC, the groups are numbered 1 to 18 replacing the older notation of groups 0, IA, IIA, ....VIIA, VIII, IB.....VIIB. Each successive period in the periodic table is associated with the filling up next higher principal energy level following aufbau sequence. The number of elements in each period is twice the number of atomic orbitals available in the energy level that is being filled. All the elements are classified into four blocks, i.e., s-block, p-block, d-block, and f-block depending on the type of atomic orbitals that are being filled with electrons. What is the position of the element in the periodic table satisfying the electronic configuration (n-1)d^1 ns^2 for n=4 ?

Numerous forms of the periodic table have been devised from time to time. A modern version which is most convenient and widely used is the long or extended from of periodic table. The aufbau principle and the electronic configuration of atoms provide a theoretical foundation for the periodic classification. The horizontal rows are called periods. There are altogether seven periods. The first period consists of 2 elements. The subsequent periods consists of 8, 8,18, 18 and 32 elements respectively. The seventh period is incomplete and like the sixth period would have maximum of 32 elements. Elements having similar outer electronic configurations in their atoms are grouped in vertical columns. These are referred to as groups or families. According to the recommendations of IUPAC, the groups are numbered 1 to 18 replacing the older notation of groups 0, IA, IIA, ....VIIA, VIII, IB.....VIIB. Each successive period in the periodic table is associated with the filling up next higher principal energy level following aufbau sequence. The number of elements in each period is twice the number of atomic orbitals available in the energy level that is being filled. All the elements are classified into four blocks, i.e., s-block, p-block, d-block, and f-block depending on the type of atomic orbitals that are being filled with electrons. Elements A, B, C, D and E have the following electronic configuration: (A) 1s^2, 2s^2 2p^1 (B) 1s^2, 2s^2 2p^6 , 3s^2 3p^1 (C ) 1s^2, 2s^2 2p^6 , 3s^2 3p^3 (D) 1s^2 , 2s^2 2p^6 , 3s^2 3p^5 (E) 1s^2 , 2s^2 2p^6 , 3s^2 3p^6 Which among these will belong to same group in the periodic table ?

Numerous forms of the periodic table have been devised from time to time. A modern version which is most convenient and widely used is the long or extended from of periodic table. The aufbau principle and the electronic configuration of atoms provide a theoretical foundation for the periodic classification. The horizontal rows are called periods. There are altogether seven periods. The first period consists of 2 elements. The subsequent periods consists of 8, 8,18, 18 and 32 elements respectively. The seventh period is incomplete and like the sixth period would have maximum of 32 elements. Elements having similar outer electronic configurations in their atoms are grouped in vertical columns. These are referred to as groups or families. According to the recommendations of IUPAC, the groups are numbered 1 to 18 replacing the older notation of groups 0, IA, IIA, ....VIIA, VIII, IB.....VIIB. Each successive period in the periodic table is associated with the filling up next higher principal energy level following aufbau sequence. The number of elements in each period is twice the number of atomic orbitals available in the energy level that is being filled. All the elements are classified into four blocks, i.e., s-block, p-block, d-block, and f-block depending on the type of atomic orbitals that are being filled with electrons. An element belongs to group 17 with atomic number is 17. What is the atomic number of the element belonging to same group and present in fifth period?

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Suneetha (A) : Third period contain 18 elements, because it has 3 subshells namely 3s, 3p and 3d. Sreelatha (B) : Third period has 8 elements, because while electrons are being filled into the shell '3d’ gets. electrons only after '4s' is filled.

AAKASH SERIES-PERIODIC CLASSIFICATION-OBJECTIVE EXERCISE - 1 (BLOCK AND TYPES OF ELEMENTS)
  1. The following ion is colourless in aqueous solution ?

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  2. Which of the following electronic configuration corresponds to an iner...

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  3. The rare gas that is most abundant in the atmosphere is

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  4. In lanthanides, the differentiating electron enters into

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  5. Which is not a transition metal?

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  6. (A): Zinc is not considered as a transition element (R): Zn or Zn^(+...

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  7. The general electronic configuration (n - 1)d^3ns^2? indicates that th...

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  8. Which one of the following pairs of ions have the same electronic conf...

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  9. The electronic configuration 1s^2 2s^6 2p^6 3s^2 3p^4 represents

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  10. What is wrong about transition metals?

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  11. Which of the following is a rare earth element?

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  12. Variable valency is exhibited by

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  13. Which one of the following is correct about stability of the given ion...

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  14. The transition element among the following is

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  15. In the sixth period, the orbitals being filled with electrons are

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  16. The general electronic configuration of d-block elements is

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  17. Identify the correctly matched set among the following

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  18. The representative elements get the nearest inert gas configuration

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  19. In transition elements, the shells that are incompletely filled

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  20. The characteristic properties of transition elements are due to

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