The purity of a solid sample can best be determined by its
The mass of one mole of \((NH_{4})_{2}CO_{3}\) is [O=16.0, N=14.0, C=12.0, H=1.0]
Atomic orbital is
The property of elements which increases down a group of the periodic table is
The reason for the decrease in the atomic size of elements across a period is that
