Chapter 8, Problem 6STP

Interpretation Introduction

Interpretation:

The number of electron pairs surrounded the central atom selenium $\left(\text{Se}\right)$ in selenium hexafluoride $\left({\text{SeF}}_{\text{6}}\right)$ are to be predicted.

Concept introduction:

The strategy for drawing Lewis structure is mention below.

• Calculate the number of valence electrons present in the molecule.
• Calculate the electron pairs by diving number of valence electrons by 2.
• Determine the bond pairs.
• Determine the lone pairs.
• Check whether the central atom satisfies octet rule.

Answer to Problem 6STP

There are six electron pairs surrounded the central atom selenium $\left(\text{Se}\right)$ in selenium hexafluoride $\left({\text{SeF}}_{\text{6}}\right)$. Therefore, option (C) is the correct option.

Explanation of Solution

Reason for correct option: The chemical formula of selenium hexafluoride is ${\text{SeF}}_{\text{6}}$. In selenium hexafluoride $\left({\text{SeF}}_{\text{6}}\right)$, the selenium $\left(\text{Se}\right)$ atom is bonded to six fluorine atom via single bond and each fluorine atom has three lone pairs. The Lewis structure of selenium hexafluoride $\left({\text{SeF}}_{\text{6}}\right)$ is shown below.

Here, there are six bonding pairs round the central selenium $\left(\text{Se}\right)$ atom. Therefore, the number of electron pairs surrounded the central atom selenium $\left(\text{Se}\right)$ in selenium hexafluoride $\left({\text{SeF}}_{\text{6}}\right)$ is six (6). Therefore, option (C) is the correct option.

Conclusion

Reason for incorrect option: There are six electron pairs around the central selenium atom. So, A is incorrect option.

There are six electron pairs around the central selenium atom. So, B is incorrect option.

There are six electron pairs around the central selenium atom. So, D is incorrect option.