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Home/ Questions/Construct the molecular orbital diagram for He2 and then identify the bond order. Bond order: Click...
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lyytutoriaExpert
Asked: April 13, 20222022-04-13T06:46:11+00:00 2022-04-13T06:46:11+00:00In: Chemistry

Construct the molecular orbital diagram for He2 and then identify the bond order. Bond order: Click…

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Construct%20the%20molecular%20orbital%20diagram%20for%20He2%20and%20then%20identify%20the%20bond%20order.%20Bond%20order:%20Click...

Construct the molecular orbital diagram for He2 and then identify the bond order. 

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                                                  He                  He2                He
Bond order:
A, 0
B,  0.5
C, 1
D, 1.5
E, 2
Click within the blue boxes to add electrons.
♦ Relevant knowledge

The Molecular orbitals form by the atomic orbitals of atoms are joined and create the creation of bonding orbitals as well as antibonding orbitals. They are connected to the whole molecules and delocalization of electron densities occurs on more than one.

bondorder
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    Charlotte Tremblay
    2022-04-13T07:21:11+00:00Added an answer on April 13, 2022 at 7:21 am
    Concepts and Reason

    The number that indicates how many bonds are between two atoms is called bond order. The bond strength of a molecule is described by its bond order.

    If the bond order for a molecule is higher, then the bond strength will also be higher.

    [katex]{\rm{Bond Order}} \propto {\rm{Bond}}\,{\rm{strength}}[/katex]

    Fundamentals

    Calculation of bond orders:

    [katex]\begin{array}{l}\\{\rm{B}}{\rm{.O}}\,{\rm{ = }}\frac{{\,{\rm{1}}}}{{\rm{2}}}{\rm{(B}}{\rm{.E – A}}{\rm{.B}}{\rm{.E)}}\\\\{\rm{Where,}}\\\\{\rm{B}}{\rm{.O}}\,{\rm{ = }}\,{\rm{Bond}}\,{\rm{order}}{\rm{.}}\\\\{\rm{B}}{\rm{.E}}\,{\rm{ = }}\,{\rm{Bonding}}\,{\rm{electrons}}{\rm{.}}\\\\{\rm{A}}{\rm{.B}}{\rm{.E}}\,{\rm{ = }}\,{\rm{Anti – bonding}}\,{\rm{electrons}}{\rm{.}}\\\end{array}[/katex]

    Below is the general molecular orbital chart.

    is
molecule
Atom
Atom
Не
Не
Не2
Energy

    The given molecule is [katex]{\rm{H}}{{\rm{e}}_{\rm{2}}}[/katex].

    Diagram of the molecule’s orbital structure (equa_tag_2)

    1s
|4k
He atom
He atom
He2 Molecule
Atom
Atom
Energy

    The given molecule is [katex]{\rm{H}}{{\rm{e}}_{\rm{2}}}[/katex].

    The number of bonding electrons found in [katex]{\rm{H}}{{\rm{e}}_{\rm{2}}}[/katex]

    The number of antibonding electrons in [katex]{\rm{H}}{{\rm{e}}_{\rm{2}}}[/katex]

    Now,

    [katex]\begin{array}{l}\\{\rm{B}}{\rm{.O}}\,{\rm{ = }}\,\,\frac{{\,{\rm{1}}}}{{\rm{2}}}{\rm{(B}}{\rm{.E – A}}{\rm{.B}}{\rm{.E)}}\,\\\\\,\,\,\,\,\,\,\,\,{\rm{ = }}\,\,\frac{{\,{\rm{1}}}}{{\rm{2}}}{\rm{(2 – 2)}}\\\\\,\,\,\,\,\,\,\,{\rm{ = }}\,\,\frac{{\,{\rm{1}}}}{{\rm{2}}}{\rm{(0)}}\\\\\,\,\,\,\,\,\,\,{\rm{ = }}\,\,{\rm{0}}\\\end{array}[/katex]

    The bond order for given molecules [katex]{\rm{H}}{{\rm{e}}_{\rm{2}}}[/katex]

    Ans is:

    Below are the details of bond order and molecular orbitals.

    bond order
ls
0
0.5
is
4h
1
S
He atom
He atom
O 1.5
4h
He2 Molecule
Atom
Atom
Energy

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