Class 11 Chemistry - Chapter Chemical Bonding and Molecular Structure NCERT Solutions | Write Lewis symbols for the following at
Write Lewis symbols for the following atoms and ions:
S and S2–; Al and Al3+; H and H–
(i) S and S2– Electronic configuration of S is [Ne]10 3s23p4, i.e it has 6 electrons in its valence shell,therefore The Lewis dot symbol of sulphur (S) is 
. The dinegative charge shows that there will be two electrons more in addition to the six valence electrons. The electronic configuration can be [Ne]10 3s23p6, Hence, the Lewis dot symbol of S2– is 
.
(ii) Al and Al3+ The electronic configuration of Aluminium is [Ne]10 3s2 3p1, i.e the valence electron is 3,therefore The Lewis dot symbol of aluminium (Al) is 
. The tripositive charge on a species infers that it has donated its three electrons to other atom & its possible electronic configuration is [Ne]10 3s1. Hence, the Lewis dot symbol is 
.
(iii) H and H– Hydrogen has electronic configuration of 1s1,it has 1 electron in its valence shell. The Lewis dot symbol of hydrogen (H) is 
. The uninegative charge infers that there will be one electron more in addition to the one valence electron. The possible configuration may be 1s2. Hence, the Lewis dot symbol is 
.
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