Question

In the modern periodic table, the element with atomic number $Z=120$ will be:

• A. Uuo ; Ununoctium ; noble gas
• B. Uno ; Unniloctium ; alkali metal
• C. Ubn ; Unbinilium ; alkaline earth metal
• D. Ubn ; Unbinilium ; alkali metal

Answer 1

The correct option is C Ubn ; Unbinilium ; alkaline earth metal

The roots of '1', '2' and '0' are 'un', 'bi' and 'nil' respectively. Hence the name becomes unbinilium and the symbol is 'Ubn'.
The electronic configuration of element having $Z=120$ is: $\left[Rn\right]5f^{14}6d^{10}7s^{2}7p^{6}8s^2$
Since the outer shell has a complete octet $\left(8s^2\right)$, it would be a alkaline earth metal.