Isoelectronic [ENDORSED]

[Mia Navarro 1D]

One of the exam questions regarded finding elements that were not isoelectronic to F-. Would atoms that had the electron configuration equivalent to [He] be acceptable? Why/why not?

[Naama 1A]

Isoelectronic means that they have the same number of electrons. Something isoelectronic to F- would have 10 electrons. Anything that doesn't have 10 electrons is therefore not isoelectronic.

[Kevin Ru 1D]

To clarify the above post. Isoelectronic atoms or ions have both the same number of valence electrons (8 in this case for F-) and the same electronic structure. As [He] only has 2 valence electrons it cannot be isoelectronic to F-. Hope that helps!

[Matthew 1C]

Since it needs to have the same nuimber of valence electrons, something isoelectronic with F- would have 10 valence electrons and have the same electron configuration of Ne, such as Na+ or O2-

[Diane Bui 2J]

Also, if I'm not mistaken, the test did ask for an ion that was isoelectronic so choosing a parent atom like "Ne" would've been incorrect.