Bromine Iodine Molecular Geometry

The video tutorial explains how to draw the Lewis structure for bromine triiodide (BrI3). It begins by counting the valence electrons, placing bromine in the center, and arranging iodine atoms around it. The tutorial details the formation of covalent bonds and the completion of octets, noting bromine's expanded octet. It concludes with an analysis of BrI3's molecular geometry, identifying it as t-shaped due to the presence of three atoms and two lone pairs around the central bromine atom.

What is the total number of valence electrons in bromine triiodide (BrI3)?

• 28

• 21

• 35

• 14

Why is bromine placed at the center of the Lewis structure for BrI3?

• Bromine is a metal.

• Bromine is more electronegative than iodine.

• For symmetry and similar electronegativity.

• Bromine has fewer valence electrons.

How many valence electrons are used after completing the octets for iodine atoms in BrI3?

• 30

• 26

• 28

• 24

What is the significance of an expanded octet in the context of bromine in BrI3?

• Bromine can only have 8 valence electrons.

• Bromine can have more than 8 valence electrons.

• Bromine cannot form covalent bonds.

• Bromine is not involved in bonding.

What is the steric number of the central bromine atom in BrI3?

• 6

• 5

• 4

• 3

How many lone pairs are present on the central bromine atom in BrI3?

• None

• One

• Two

• Three

What is the molecular geometry of BrI3?

• Tetrahedral

• Trigonal planar

• Linear

• T-shaped

What does the 'AXN' notation represent in molecular geometry?

• Number of protons in the nucleus.

• Number of electrons in the outer shell.

• Number of bonds in the molecule.

• Number of atoms and lone pairs around the central atom.

In the AXN notation for BrI3, what does 'N' represent?

• Number of atoms bonded to the central atom.

• Number of total electrons.

• Number of lone pairs on the central atom.

• Number of valence electrons.

Which of the following best describes the shape of BrI3?

• T-shaped

• Bent

• Square planar

• Trigonal bipyramidal