I would have to say its Solution
A species that is isoelectronic with the oxide ion will have the same electron configuration of electrons as as the oxide ion.
4 species that are isoelectronic with the oxide ion are F^(-), Ne, Na^(+), and Mg^(2+).
All of the electron configuration of these ions end at 2p⁶.
Answer:
15.5 km
Explanation:
1.55 x 10^4 m means 1.55 x 10000 = 15,500 m
1 km = 1000 meters
To convert to km we divide by 1000
So 15,500/1000
= 15.5 km