1. How do the electronic configurations of the elements with Z =1… - Vidyadip

Question

1. How do the electronic configurations of the elements with $Z =107-109$ differ from one another?
2. $Rn ( Z =86)$ is the last noble gas discovered. Predict what will be the atomic number of the next noble gas to be discovered. Write its symbol.

✓

Answer

1.

Atomic Number of element (Z)	Electronic configuration	Number of electrons in 6d orbital	Group Number
107	$\begin{gathered}{[R n] 5 s^{14} 6 d^5} 7 s^2\end{gathered}$	5	7
108	$\begin{gathered}{[ Rn ] 5 s^{14} 6 d^6} 7 s^2\end{gathered}$	6	8
109	$\begin{gathered}{[R n] 5 s^{14} 6 d^7} 7 s^2\end{gathered}$	7	9

It is clear that these elements differ in the number of electrons in the 6d-subshell and group number in periodic table.
2. 118, Uuo

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