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Following are some statements about mode...

Following are some statements about modern periodic table
i) It consists of s, p, d and f blocks
ii) The energy levels filling order in 6th period is 6s, 4f, 5d and 6p
iii) IIIA group contains maximum number of elements

A

only i & ii are correct

B

only i is correct

C

only ii & iii are correct

D

all are correct

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The correct Answer is:
A
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The following are some statements about Mendeleeff's periodic table i) It is based on increasing order of atomic numbers ii) Mendeleeff corrected the atomic weight of some elements like Be, In etc iii) (Ar,K), (Co,Ni), (Te,I) are three inverted pairs

The following are some statements about Mendeleev's peridioc table (i) It is based on increasing order of atomic numbers . (ii) Mendeleev corrected the atomic weight of some elements like Be, In, U, etc. (iii) (Ar, Ca), (Co, Cu), (Te , F) are three inverted pairs. (iv) it is based on increasing order of atomic weights.

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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. What is the position of the element in the periodic table satisfying the electronic configuration (n-1)d^1 ns^2 for n=4 ?

AAKASH SERIES-PERIODIC TABLE-OBJECTIVE EXERCISE -2B
  1. The following are some statements about Mendeleeff's periodic table ...

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  2. The following are some statements about modern periodic table i) It...

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  3. Following are some statements about modern periodic table i) It con...

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  4. Exhibition of various oxidation states by transition elements is due t...

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  5. X' is most inert element and 'Y' is most reactive element in the long ...

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  6. In the presence of six ligand units the degeneracy of d-orbitals is lo...

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  7. Which of the following is true

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  8. Match the following

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  9. Match the following

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  10. Match the following

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  11. Match the following

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  12. The following are some statements about noble gases i) They are betw...

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  13. The following are some statements about transition elements i) IIB g...

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  14. (A): Zn is not a transition element. (R) : Elements with incomplete...

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  15. The atomic number of an element is 35. what is the total number of ele...

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  16. Regarding lanthanide contraction, some statements are given a) It a...

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  17. I1 of an element X is 899 kJ "mole"^(-1) and that of another element ...

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  18. Consider the following changes a) M((g))^(+2) rarr M((g))^(+3) + e^...

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  19. The correct order of IP2 , values among F, Na, Mg and Al is

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  20. The first (IP1) and the second (IP2) ionisation potential (kJ mol 1) o...

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