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Sc = 1s^22s^2 2p^6 3s^2 3p^6s 4s^2 3d^1....

Sc =` 1s^2``2s^2`` 2p^6` `3s^2`` 3p^6s` `4s^2`` 3d^1`.this is belongs to

A

s- block

B

p- block

C

d- block

D

f- block

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Element with electronic configuration 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 5s^2 5p^3 belongs to the ...........group of the periodic table

""_(21 ) Sc : 1s^(2 ) 2s ^(2) 2p ^(6) 3s^(2)3p ^(6 ) 4s ^(2) 3d^(1) Scandium belongs to which block ?

Element with electronic configuration: 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 5s^2 5p^3 belongs to the ____period of periodic table

Electronic configuration of an element is 1s^2 2s^2 2p^6 3s^2 3p^6 3d^5 4s^1 . It belongs to

In an atom the number of electrons in M - shell is equal to the number of electrons in the K and L - shell . Answer the question. Explanation : 1) Number of electrons in K-shell (1 s^(2)) = 2 Number of electrons in L-shell (2s^(2) sp^(6)) = 8 Total number of electrons in k & L shells = 10 2) Given that number of electrons in M-shell is equal to number of electrons in K& L- shells 3) Hence number of electrons in M-shell (3s^(2) 3p^(6) 3d^(2)) = 10 4) But , we know that before filling of 3d orbital 4s should be filled (4s^(2)) 5) So , electronic configuration is 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 4s^(2) 3d^(2) What is the atomic number of element ?

In an atom the number of electrons in M - shell is equal to the number of electrons in the K and L - shell . Answer the question. Explanation : 1) Number of electrons in K-shell (1 s^(2)) = 2 Number of electrons in L-shell (2s^(2) sp^(6)) = 8 Total number of electrons in k & L shells = 10 2) Given that number of electrons in M-shell is equal to number of electrons in K& L- shells 3) Hence number of electrons in M-shell (3s^(2) 3p^(6) 3d^(2)) = 10 4) But , we know that before filling of 3d orbital 4s should be filled (4s^(2)) 5) So , electronic configuration is 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 4s^(2) 3d^(2) Which is the outermost cell ?

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 ?

""_(11)Na=1s^(2) 2s^(2)2p^(6) 3s^(1) ""_(21) Sc=1s^(2)2s^(2)2p^(6) 3s^(2)3p^(6) 4s^(2)3d^(1) Write the group and periods of the given elements.

""_(11)Na=1s^(2) 2s^(2)2p^(6) 3s^(1) ""_(21) Sc=1s^(2)2s^(2)2p^(6) 3s^(2)3p^(6) 4s^(2)3d^(1) Which one can form cation rasily ? Why ?

Identify the element that has the following electronic configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^ 4d^10 5p^6 6s^2 4f^2

VGS PUBLICATION-BRILLIANT-CLASSIFICATION OF ELEMENTS-THE PERIODIC TABLES-EXERCISE
  1. Differentiating electrons of some elements are as given, Na = 3s^1, Al...

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  2. 11(Na) 1s^2 2s^2 2p^6 3s^1. i) It is a s- block element, ii) It's vale...

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  3. Sc = 1s^22s^2 2p^6 3s^2 3p^6s 4s^2 3d^1.this is belongs to

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  4. B, Si, Ge,  As are:

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  5. Carbon and Nitrogen belongs to groups respectively

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

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  7. Between ""(11) Na and ""(17) Cl, which one has more ionization...

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  8. Which one is true ? i) More nuclear charge, more ionization energy. i...

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  9. Penetration power towards nucleus of various orbitals are 4s g...

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  10. Electron affinity values in (KJ mol^(-)) F(-328), Cl-(349), Br(-325), ...

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  11. F(4.0), Cl(3.0), Li(1.0), Be (1.47) Electronegativity values are give...

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  12. B, Si, Ge,  As are:

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  13. Element with electronic configuration: 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10...

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  14. In the 5^th period the orbitals being filled are

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  15. Which of the following has both members from the same period of the pe...

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  16. Which of the following is an element in 3^rd period II group

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  17. The metallic character is high among the following

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  18. The group in which all elements are gases is

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  19. The element with atomic number 7 is found in

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  20. What is the similarity in the properties of beryllium and aluminium? W...

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