Question

Ionisation potential of ${Be}^{x+}$ is found to be 217.6eV when in the first orbit. The value of X is 3. If true enter 1, else enter 0.

Answer 1

Ionization potential of ${Be}^{x+}$ is found to be 217.6eV when in the first orbit.
This corresponds to the effective nuclear charge of 4.
Hence, Z=$Z^{\ast }$=4
i.e, no screening and it is one-electron system.
Hence, the value of X is 3.