Question

Which two species are isoelectronic, i.e., they contain the same number of electrons?
A. Rb+ and K+ B.Cl and Na+ C.Cl- and Br- D.Fe2+ and Co2+ E. N-3 and Na+

Answer 1

Answer:

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Explanation:

Atoms and ions that have the same electron configuration are said to be isoelectronic. Examples of isoelectronic species are N3–, O2–, F–, Ne, Na+, Mg2+, and Al3+ (1s22s22p6).

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Answer 2

Answer:

Na+ is isoelectronic with Mg2+ ,Ne ,Al3+ no of electrons are 10.As you go from Na+ to Mg2+ to Al3+, the number of protons in the nucleus increases and so pulls the outer electrons in more and more. The same thing is true for the other set of ions as well. ... The smallest ion will be the one with the largest number of protons – Al3+; the biggest, the one with the least protons – N3-.Atoms and ions that have the same electron configuration are said to be isoelectronic. Examples of isoelectronic species are N3–, O2–, F–, Ne, Na+, Mg2+, and Al3+ (1s22s22p6). Another isoelectronic series is P3–, S2–, Cl–, Ar, K+, Ca2+, and Sc3+ ([Ne]3s23p6).please mark brainlist answer