Name the element with electronic configuration 1s2 2s2 2p6 3s2 3p1

Explanation

Volume of solute = 0.6 mL
Density of solute = 1.06g `mL^(-1)`
Mass of solute = `0.6xx1.06=0.636g`
Volume of solvent = 1L = 1000 mL
Density of solvent = 1 g `mL^(-1)`
Mass of solvent = 1000g
`DeltaT_(f)=0.0205K,K_(f)=1.86`
Concentration of solution = `0.636/(60)xx1000/(1000)=0.011`
`i=(DeltaT_(f)xxM_(B)xxW_(A))/(K_(f)xxW_(B)xx1000)=(0.0205xx60xx1000)/(1.86xx0.636xx1000)=1.039=1.04`
`alpha=(i-1)/(n-1)=(1.04-1)/(2-1)=0.04`
`CH_(3)COOHhArrCH_(3)COO^(-)+H^(+)`
At equilibrium `C(1-alpha)" " Calpha" " Calpha`
`K_(a)=(Calpha^(2))/(1-alpha)=(0.01xx(0.04)^(2))/(1-0.04)=(0.011xx0.0016)/(0.96)=(176xx10^(-7))/(0.96)=(176xx10^(-5))/(96)`
`K_(a)=1.86xx10^(-5)`.