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CBSE Class 10 Answered

what is the numberof valence electrons of elements placed in groups from 3 to 12? how can we calculate them?
Asked by gcharu09 | 26 Feb, 2011, 02:45: AM
Expert Answer
Dear Student
 
The valence electrons are the electrons of an atom that can participate in the formation of chemical bonds with other atoms. Valence electrons are the "own" electrons, present in the free neutral atom, that combine with valence electrons of other atoms to form chemical bonds. For main group elements, only the outermost electrons are valence electrons. In transition metals, some inner-shell electrons are also valence electrons.
 
So, in case of counting electrons of Group 3-12, the d-electrons are also counted.
 
We hope that clarifies your query.
Regards
Team
Topperlearning
Answered by | 26 Feb, 2011, 09:57: AM

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