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1s^(2) , 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^...

`1s^(2) , 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(10)` . Which rule is violated ?

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Aufbau rule .
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1s^(2) , 2 s^(2) , 2p_(x) ^(2) . Which rule is violated

The element with the electronic configuration 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(10) 4s^(1) is

""_(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 ?

""_(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.

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 ?

a) 1s^(2) 2s^(2) 2p^(3) implies (b) 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(2) implies Z = 20 c) Electronic configuration of He is 1 s^(2) implies Which one contradicts the Aufbau rule ?

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) How many electrons are there in its outermost shell ?

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

In an atom the number of electrons in N - Shell is equal to the number of electrons in K, L and M shells. Answer the question. Which is the outermost shell ? Explanation : K = 1 s^(2) (2) electrons L = 2s^(2) 2p^(6) (8) electrons M = 3s^(2) 3p^(6) 3d^(10) (18) electrons Total (28) electrons N = 4s^(2) 4p^(6) 4d^(10) 4f^(10) (28) electrons To fill 4f^(10) , 1s^(2) , 2s^(2) 2p^(2) 2p^(6) 3s^(2) 3p^(6) 4s^(2) 3d^(10) 4p^(6) 5s^(2) 4d^(10) 5p^(6) 6s^(2) should be filled Hence , the electronic configuration is 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 4s^(2) 3^(10) 4p^(6) 5s^(2) 4d^(10) 5p^(6) 6s^(2) 4f^(10) .

In an atom the number of electrons in N - Shell is equal to the number of electrons in K, L and M shells. Answer the question. How many electrons are there in its outermost shell ? Explanation : K = 1 s^(2) (2) electrons L = 2s^(2) 2p^(6) (8) electrons M = 3s^(2) 3p^(6) 3d^(10) (18) electrons Total (28) electrons N = 4s^(2) 4p^(6) 4d^(10) 4f^(10) (28) electrons To fill 4f^(10) , 1s^(2) , 2s^(2) 2p^(2) 2p^(6) 3s^(2) 3p^(6) 4s^(2) 3d^(10) 4p^(6) 5s^(2) 4d^(10) 5p^(6) 6s^(2) should be filled Hence , the electronic configuration is 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 4s^(2) 3^(10) 4p^(6) 5s^(2) 4d^(10) 5p^(6) 6s^(2) 4f^(10) .

VGS PUBLICATION-BRILLIANT-STRUCTURE OF ATOM -CREATIVE QUESTIONS FOR NEW MODEL EXAMINATION ( SECTION - I 1/2 MARK QUESTIONS)
  1. "No two electrons of the same atom can have all four quantum numbers t...

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  2. What is the maximum number of electrons in any shell, lf 'n' ls the pr...

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  3. What is the maximum number of electrons in a sub-shell (s, p, d, f) ? ...

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  4. What is the meaning of word 'Aufbau'?

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  5. Which formula can be used to calculate energy of an orbital ?

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  6. In 4s, 4p, 4d, 3d orbitals, which one has least energy ?

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  7. 'Moeller chart' deals with a) Pauli's principle b) Aufbau principle ...

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  8. Which principle is stated that the orbitals are filled in the order of...

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  9. 1s^(2) , 2 s^(2) , 2p(x) ^(2) . Which rule is violated

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  10. He : Which rule is violated ?

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  11. 1s^(2) , 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(10) . Which rule is violated ...

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  12. Write the electronic configuration of chromium (Cr) and copper (Cu).

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  13. Write the electronic configuration of chromium (Cr) and copper (Cu).

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  14. Which rule does not support this ?

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  15. Which rule is violated in the electronic configuration 1s^(0) 2s^(2) 2...

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  16. Write the four quantum numbers for the differentiating electron of sod...

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  17. Which electron shell is at a higher energy level K or L ?

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  18. Maximum number of electrons that an M-shell contains is / are ……….

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  19. The wavelength of a radiowave is 1 m. Find its frequency:

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  20. Prepare a question on n l ^(x) method.

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