Valence Electrons and Molecular Geometry of SF5-

This video tutorial explains how to write the Lewis structure for SF5-. It covers the total valence electrons, placing sulfur as the central atom, and arranging five fluorine atoms around it. The video details forming chemical bonds, using lines to represent electron pairs, and explains sulfur's ability to have an expanded octet. It completes the Lewis structure by adding electrons to fluorines and sulfur, resulting in a total of 42 valence electrons. The molecular geometry is described as square pyramidal with bond angles of 90 degrees, influenced by the lone pair of electrons on sulfur.

How many total valence electrons are present in SF5-?

• 52

• 42

• 62

• 32

Which element is placed at the center of the SF5- structure?

• Oxygen

• Fluorine

• Nitrogen

• Sulfur

How many pairs of electrons are initially placed between sulfur and fluorine atoms?

• 4

• 10

• 5

• 2

What is the maximum number of valence electrons sulfur can have in SF5-?

• 8

• 10

• 14

• 12

How many valence electrons does each fluorine atom have after completing its octet?

• 8

• 7

• 9

• 6

What is the molecular geometry of SF5-?

• Square Pyramidal

• Trigonal Bipyramidal

• Octahedral

• Tetrahedral

How do lone pairs affect the molecular geometry of SF5-?

• They increase the bond angles.

• They push bonded atoms closer together.

• They do not affect the geometry.

• They push bonded atoms further apart.

What is the bond angle in the SF5- molecular geometry?

• 60 degrees

• 180 degrees

• 90 degrees

• 120 degrees

What is the effect of the lone pair on the position of the fluorine atoms in SF5-?

• It attracts them closer.

• It repels them downward.

• It aligns them in a straight line.

• It has no effect.

Who is the presenter of the video on SF5- Lewis structure?

• Dr. A

• Dr. B

• Dr. C

• Dr. D