41. If the first LP and E.A of silicon are 785.7kj mol and 135.0ký mole respectively, the electro negativity of Si is equal to
1. ( 78.5.7+135.0 2 )
2. (0.208sqrt(7854.7 - 135.0)
3. ( 785.7+135.0 544 )
4. ( 785.7+135.0 4.18 )​


please help me please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please​