Chemical Bonding: Lewis Structures & VSEPR Theory

What is the central atom in nitrate ion (NO₃^- )

• 3

• O

• N

• none

The following species are exception to octet rule EXCEPT

Tags

NGSS.HS-PS1-1

The following species can form resonance structures EXCEPT

A triple bond formed when two atoms share three electrons, as in nitrogen molecule. 

• TRUE

• FALSE

VSEPR theory is used to predict

• the number of unshared pairs of electrons in a Lewis structure.

• the number of multiple bonds in a Lewis structure.

• the three-dimensional geometry of a molecule.

• the three-dimensional crystal lattice structure of ionic compounds.

The basic molecular shape in bromine trifluoride (BrF₃) is trigonal bipyramidal. 

• TRUE

• FALSE

What is the molecular shape of a silicon dioxide molecule?

• linear

• trigonal planar

• bent

• tetrahedral

Which of the following correctly matches a compound with its molecular geometry?

• Water (H₂O) : linear

• Carbon dioxide (CO₂): tetrahedral

• Ammonia (NH₃): trigonal planar

• Methane (CH₄): tetrahedral

AB₄E is a symbol for molecular shape __________________

• linear

• T-shaped

• seesaw

• trigonal bipyramidal

Which of the following shapes has no unshared pairs of electrons on the central atom?

• Trigonal pyramidal

• Bent

• Square planar

• Octahedral