Q No.-1> atoms may be regarded as comprising ofp's,n's and e's.if the mass attributed by electrons was doubled and thatby neutrons was halved d at mass of C-12 'll b?a)approx. thesameb)doubledc)reduced aprrox. 25%d)approx. halvedQNo 2> the wave no. fo 1st line of Balmer series of H z15200cm^-1.the wave no of the first balmer line of Li2+ ion z?a)15200b)60800c)76000d)136800

Avijeet Rathsharma , 14 Years ago

Grade 12