Calculate the mass and charge of one mole of electrons.

Write the complete symbol for the atom with the given atomic number (Z) and atomic mass (A)

$\mathrm{Z}=92 , \mathrm{A}=233.$

What are the atomic numbers of elements whose outermost electrons are represented by

(a) $3{\mathrm{s}}^1$ (b) $2{\mathrm{p}}^3$ and (c) $3{\mathrm{p}}^5$?

Using $\mathrm{s}, \mathrm{p}, \mathrm{d}$ notations, describe the orbital with the following quantum numbers.

$\mathrm{n} = 3; \mathrm{l}=1$

In Rutherford’s experiment, generally the thin foil of heavy atoms, like gold, platinum etc. have been used to be bombarded by the α-particles. If the thin foil of light atoms like Aluminium etc. is used, what difference would be observed from the above results ?