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RH

  • one year ago

How many half-filled orbitals are there in a manganese (atomic number 25) atom? A. 4 B. 1 C. 5 D. 3 E. 2

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  1. RH
    • one year ago
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    Is B the correct answer?

  2. ANISH95
    • one year ago
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    no. its not, write the electronic config.

  3. RH
    • one year ago
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    1s2 2s2 2p6 3s2 3p6 3d5 4s2

  4. ANISH95
    • one year ago
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    the complete electronic configuration

  5. RH
    • one year ago
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    is this correct?

  6. ANISH95
    • one year ago
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    absolutely. correct. gd!

  7. ANISH95
    • one year ago
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    now how many unpaired electrons are there

  8. RH
    • one year ago
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    can you explain how to know how many unpaired electrons there are?

  9. ANISH95
    • one year ago
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    except for 3d, each orbital has even number of electrons, which implies paired electrons. do you know how many orbitals are there in d

  10. RH
    • one year ago
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    5 orbitals?

  11. ANISH95
    • one year ago
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    yes.... right, now you see that 3d subshell has 5 orbitals and 5 electrons are to be housed in these 5 orbitals. try to fill 5 electrons in 5 orbitals. you will have the answer,

  12. ANISH95
    • one year ago
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    u know hund's rule of maximum multiplicity? the only way to do this is to fill each orbital with 1 electron and this arrangement will give you 5 alone electrons.....(which are not paired up)

  13. ANISH95
    • one year ago
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    any difficulty.?

  14. RH
    • one year ago
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    I think I understand now. but how do you know which rule to use to find half-filled orbitals?

  15. ANISH95
    • one year ago
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    there are three main rules to write electronic configurations. 1) afbau principle 2) hunds rule of maximum multiplicity 3) pauli's exclusion principle..................... this last one is of minimal importance in writing configurations but you must learn the above two to know how to write electronic configuration

  16. RH
    • one year ago
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    Ok!!! Thanks a lot!

  17. RH
    • one year ago
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    so there are 5 half filled orbitals in a manganese atom?

  18. ANISH95
    • one year ago
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    yes there are 5

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