Which of the following make an isoelectronic pair: #Cl^-#, #O^(2-)#, #F#, #Ca^(2+)#, #Fe^(3+)#?
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"How many moles of sodium hydroxide are needed to neutralize 1 mole of phosphoric acid?"
1 Answer
Dec 15, 2016
Explanation:
Isoelectronic means "same electronic structure". For atoms, we can say the "same number of valence electrons".
We can assume that if an atom and an ion or two ions have the same number of electrons, they will be arranged in the same shells and subshells.
The calcium and chloride ions both have 18 electrons.
