48gRO4 右上角有2-中,核外電子總數(shù)比質(zhì)子總數(shù)多6.02*10 23個(gè),即多1 mol了電子.
1個(gè)RO4(2-)中電子數(shù)為:R + 8*4 + 2 = R + 34 (2來自兩個(gè)負(fù)電荷)
1個(gè)RO4(2-)中質(zhì)子數(shù)為:R + 8*4 = R + 32
1個(gè)RO4(2-)中電子數(shù)比質(zhì)子總多2個(gè).
48gRO4(2-)中,核外電子總數(shù)比質(zhì)子總數(shù)多6.02*10 23個(gè),即多1 mol了電子,48gRO4(2-)物質(zhì)的量為1/2 = 0.5 mol
RO4(2-)摩爾質(zhì)量為:48/0.5 = 96 g/mol
R原子的摩爾質(zhì)量為:96 -16*4= 32 g/mol
(R的質(zhì)子數(shù)與中子數(shù)相等,R原子的質(zhì)子數(shù)與中子數(shù)都是32/2 = 16)