Answers

2014-12-18T21:53:25+05:30
No valence electrons does not differ in group because In group all elements will have same properties
0
it has to be "similar properties"
2014-12-19T07:27:16+05:30

The general method for counting valence electrons is generally not useful for transition metals. Instead the modified d electron count method is used.

** Except for helium, which has only two valence electrons.

0