核内中子数为N 的R2+,质量数为A ,则m g 其氧化物中所含质子的物质的量为( )
A m/A+16 (A – N + 8)mol B m/A+16 (A – N + 10)mol
C (A – N - 2)mol D m/A (A – N + 6)mol
核内中子数为N 的R2+,质量数为A ,则m g 其氧化物中所含质子的物质的量为( )
A m/A+16 (A – N + 8)mol B m/A+16 (A – N + 10)mol
C (A – N - 2)mol D m/A (A – N + 6)mol