Which of the following set of ions/ molecules is isoelectric and structural?a)SF4, SiF4, XeF4, PF4+b)CO2, CN22-, C34-, SO2c)BeF42-, BF4-, CF4, NF4+d)CO32-, NO3-, SO32-, PO32-Correct answer is option 'C'. Can you explain this answer?

Question

Accepted Answer

Isoelectronic species are those have same number of electrons.

Answer

Isoelectronic species are those have same number of electrons..you can draw the structure s and check that each specie has 8 electrons

Answer

Explanation:

Definition of Isoelectronic:
Two or more ions or molecules are said to be isoelectronic if they have the same number of electrons.

Definition of Structural Isomer:
Structural isomers are compounds that have the same molecular formula but differ in the arrangement of atoms within the molecule.

Analysis of the Options:

a) SF4, SiF4, XeF4, PF4:
- SF4 (Sulfur tetrafluoride) has 34 electrons.
- SiF4 (Silicon tetrafluoride) has 32 electrons.
- XeF4 (Xenon tetrafluoride) has 36 electrons.
- PF4 (Phosphorus tetrafluoride) has 40 electrons.

Since none of these molecules have the same number of electrons, they are not isoelectronic. Additionally, they are not structural isomers because they have different chemical formulas.

b) CO2, CN2^2-, C3^4-, SO2:
- CO2 (Carbon dioxide) has 16 electrons.
- CN2^2- (Cyanide ion) has 18 electrons.
- C3^4- (Carbonate ion) has 20 electrons.
- SO2 (Sulfur dioxide) has 18 electrons.

Again, none of these molecules have the same number of electrons, so they are not isoelectronic. They also have different chemical formulas, so they are not structural isomers.

c) BeF4^2-, BF4-, CF4, NF4:
- BeF4^2- (Beryllium tetrafluoride) has 16 electrons.
- BF4- (Tetrafluoroborate ion) has 32 electrons.
- CF4 (Carbon tetrafluoride) has 32 electrons.
- NF4 (Nitrogen tetrafluoride) has 32 electrons.

In this set, BeF4^2-, BF4-, CF4, and NF4 all have the same number of electrons (32). Therefore, they are isoelectronic. They also have different chemical formulas, making them structural isomers.

d) CO3^2-, NO3-, SO3^2-, PO3^2-
- CO3^2- (Carbonate ion) has 24 electrons.
- NO3- (Nitrate ion) has 24 electrons.
- SO3^2- (Sulfite ion) has 26 electrons.
- PO3^2- (Phosphite ion) has 26 electrons.

In this set, CO3^2-, NO3-, SO3^2-, and PO3^2- have different numbers of electrons, so they are not isoelectronic. Additionally, they have different chemical formulas, so they are not structural isomers.

Conclusion:
The set of ions/molecules that is both isoelectronic and structural isomers is option 'C' (BeF4^2-, BF4-, CF4, NF4).

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