Which of the following pairs does not consist | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) Isoelectronic species are those that have the same number of electrons.$1. Sm^{2+}: 62 - 2 = 60 	ext{ electrons}; Er^{3+}: 68 - 3 = 65 	ext{ ele

Vedclass · Accepted Answer

Both $(A)$ and $(C)$ are correct

Vedclass · Answer

(D) Isoelectronic species are those that have the same number of electrons.$1. Sm^{2+}: 62 - 2 = 60 	ext{ electrons}; Er^{3+}: 68 - 3 = 65 	ext{ electrons}$. Since $60 
eq 65$,they are not isoelectronic.$2. Yb^{2+}: 70 - 2 = 68 	ext{ electrons}; Lu^{3+}: 71 - 3 = 68 	ext{ electrons}$. Since $68 = 68$,they are isoelectronic.$3. Tb^{2+}: 65 - 2 = 63 	ext{ electrons}; Tm^{4+}: 69 - 4 = 65 	ext{ electrons}$. Since $63 
eq 65$,they are not isoelectronic.Therefore,both pairs $(A)$ and $(C)$ are not isoelectronic.

Which of the following pairs does not consist of isoelectronic species? (Atomic numbers: $Sm = 62, Er = 68, Yb = 70, Lu = 71, Eu = 63, Tb = 65, Tm = 69$)

Similar Questions

Although Zirconium belongs to the $4d$ transition series and Hafnium to the $5d$ transition series,they show similar physical and chemical properties because . . . . . . .

Which of the following elements has the highest number of unpaired electrons in its ground state?

Which ion is not coloured?

Which of the following has the maximum number of unpaired electrons?

The $E^{\circ}$ value for the $Mn^{3+} / Mn^{2+}$ couple is more positive than that of $Cr^{3+} / Cr^{2+}$ or $Fe^{3+} / Fe^{2+}$ due to change of

Vedclass Test Series

Exam Paper Generator

Online Exam Module