Which  of the following about an electron occupying the 1s-orbital in a hydrogen atom  are correct  (The Bohr radius is represented by  $a_0$)

Statement (d) is incorrect. For 1s-orbital radial probability density $\left(R^2\right)$ against r give as:  For 1s-orbital, probability density decreases sharply as we move away from the nucleus. The radial distribution curves obtained by plotting radial probability functions Vs r for  1st orbital is The graph initially increases and then decreases. It reaches a maximum at a distance very close to the  nucleus and then decreases. The maximum in the curve corresponds to the distance at which the  probability of finding the electron is maximum.