Question
Asked Nov 20, 2019
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Determine the number of bonding electrons and the number of nonbonding electrons in the structure of SI2.

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Expert Answer

Step 1

For calculating the number of bonding and non-bonding electrons in the structure of SI2, we need to draw the lewis structure. There are following three steps: -

Step 1: - Determine the central atom in this molecule.

Sulphur (EN = 2.58) is less electronegative than iodine (EN = 2.66), so sulphur is the central atom.

Step 2: - Calculate the total no. of valence electrons present.

The total no. of valence electron present in SI2

ELEMENTS
VALENCE ELECTRONS
GROUP
6A
S
1x6е -бе
2 x 7 e 14 e
7A
Total 20 valence electrons
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ELEMENTS VALENCE ELECTRONS GROUP 6A S 1x6е -бе 2 x 7 e 14 e 7A Total 20 valence electrons

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Step 2

Step 3: - Draw the lewis structure of the molecule.

Sulphur (S) will be in the centre and Iodine (I) is a terminal atom.

-S -
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-S -

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Step 3

A bond corresponds to 2 electrons shared between two atoms, so currently we have 2 x 2 electrons = 4 valence electrons, which mea...

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