Chemistry Ch 8 Review

With VSERP theory, three atom molecules can be linear.

• Depends
• True
• Sometimes
• False

Resonance in Lewis structures means

• Resonance structures are always identical
• Multiple valid ways to draw the structure for a molecule or ion/ there are intermediate characters

• Resonance occurs only in ionic compounds
• The structure is unstable and cannot exist

What determines the polarity of bonds?

• Atomic number
• Bond length
• Molecular weight
• Electronegativity difference

Tetrahedral shapes have what angle between bonds?

• 109.5 degrees
• 90 degrees
• 120 degrees
• 180 degrees

Sigma bonds occur when

• two atomic orbitals overlap along the axis connecting the nuclei of the bonding atoms
• sigma bonds form when the atomic orbitals do not overlap
• sigma bonds occur when the bonding atoms are not in a straight line
• two atomic orbitals overlap perpendicular to the axis connecting the nuclei of the bonding atoms

What molecule would have a bent shape?

• Carbon dioxide (CO2)
• Oxygen (O2)
• Water (H2O)
• Methane (CH4)

Tags

NGSS.MS-PS1-1

What molecule has a trigonal planar shape?

• water (H2O)
• carbon dioxide (CO2)
• methane (CH4)
• boron trifluoride (BF3)

Which of these is NOT linear molecule?

• HCl

• Water (H2O)
• CS2

• Carbon dioxide (CO2)

Which of these would likely be your central atom? Beryllium, Bohrium, Boron, Bromine

• Beryllium
• Bohrium
• Bromine
• Boron

Tags

NGSS.HS-PS1-1

What is the valence bond theory?

• It is a model used in chemistry to explain the formation of chemical bonds between atoms/ the localized energy theory.

• It is a concept used in economics to explain market equilibrium.
• It is a hypothesis used in biology to explain the process of evolution.
• It is a theory used in physics to explain the behavior of subatomic particles.

Tags

NGSS.HS-PS1-1