Define atomic orbital. Explain the shapes of $\mathrm{s}, \mathrm{p}$ and $\mathrm{d}$ orbitals with the help of diagrams.

What is the complete symbol for the atom with the atomic number $\left(\mathrm{Z}\right)$ and atomic mass $\left(\mathrm{A}\right)$ as $\mathrm{Z}=4, \mathrm{A}=9$.

What is the complete symbol for the atom with the atomic number $\left(\mathrm{Z}\right)$ and atomic mass $\left(\mathrm{A}\right)$ as $\mathrm{Z}=17, \mathrm{A}=35$.

What is the complete symbol for the atom with the atomic number $\left(\mathrm{Z}\right)$ and atomic mass $\left(\mathrm{A}\right)$ as $\mathrm{Z}=92, \mathrm{A}=233$.