The element whose one atom has mass of `10.86xx10^(-26)` kg is (Atomic masses : B = 10.8 u, Ca = 40 u, Ag = 107.8 u, Zn = 65.4 u).

Options

A. Boron
B. Calcium
C. Silver
D. Zinc

Answer

D

Explanation

1 atom has mass `= 10.86 xx 10^(-26) kg `
` = 10.86 xx 10^(-23)g `
`6.022 xx 10^(23) ` atoms has
mass `= 10.86 xx 10^(-23) xx 6.022 xx 10^(23) = 65.40 g`
This is the atomic weight of Zn.