Which of the following ions are isoelectronic (have the same total number of electrons)? K+; Ca2+;...

Question

Question

Which of the following ions are isoelectronic (have the same total number of electrons)?

K+; Ca2+; Fe3+; Br-; S2-; Ne; O2-; Rb+

Answer 1

Answer #1

isoelectronic means having same number of electrons

K+ = 18 e

Ca2+ = 18 e

Fe3+ = 23 e

Br- = 36 e

S2- = 18e

Ne = 10e

O2- = 10e

Rb+ = 36e

so,

(K+, S2- & Ca2+) , (Ne & O2-) , (Br- & Rb+)

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Answer 2

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