Question

which is the example of expanded octet?
(a) BeF2
(b) XeF2
(c) CO2
(d) OF2​

Answer 1

Option (c) CO2

In carbon dioxide each oxygen shares four electrons with the central carbon, two (shown in red) from the oxygen itself and two (shown in black) from the carbon. All four of these electrons are counted in both the carbon octet and the oxygen octet, so that both atoms are considered to obey the octet rule.

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Answer 2

Answer:

The correct option is (b) $XeF_{2}$.

Explanation:

• The electronic configuration of $Xe$ is $[Kr]4d^{10}5s^{2}5p^{6}$.
• It is a noble gas as it has a complete outermost shell.
• $Xe$ does not obey the octet rule.
• It can make bonds, despite having a complete outer shell.
• It has an empty 5-d orbital in which it can expand its octet.
• It allows electrons to be filled in its vacant orbital.
• It can make multiple bonds with $F$ and $O$.

Conclusion:

$XeF_{2}$ is an example of an expanded octet.