Valence Bond Theory Quiz

What is the primary reason why the valence bond theory needs modification according to the text?

• It accurately explains the bonding in all molecules.

• It cannot explain the bonding in molecules with electron-deficient central atoms like Be and B.

• It is too complex to understand.

• It only applies to noble gases.

According to the valence bond theory, how many covalent bonds should a hydrogen atom typically form?

• Two

• None

• One

• Three

Why does the valence bond theory fail to explain the bonding behavior of noble gases?

• Noble gases have too many unpaired electrons.

• Noble gases form too many bonds.

• Noble gases do not form bonds because they have no unpaired electrons.

• Noble gases are not included in the theory.

What is the purpose of hybridization in atomic orbitals according to the Hybridization Theory?

• To increase the number of valence electrons

• To allow atoms to bond using their atomic orbitals without changes

• To mix atomic orbitals to form hybrid molecular orbitals used for bonding

• To decrease the energy levels of atomic orbitals

What happens to the valence electrons of atoms during the process of hybridization?

• They are removed from the atom

• They occupy the new hybrid orbitals

• They remain in the original atomic orbitals

• They are shared directly without hybridization

What type of hybrid orbitals does beryllium form in BeF2 according to the hybridization theory?

• A) sp^2

• B) sp^3

• C) sp

• D) d

How many bonding orbitals does beryllium need in BeF2?

• A) 1

• B) 2

• C) 3

• D) 4

What is the total number of hybrid orbitals formed by beryllium in BeF2?

• A) 1

• B) 2

• C) 3

• D) 4

How many electron pairs surround beryllium in BeF2?

• A) 1

• B) 2

• C) 3

• D) 4

What is the result when one s orbital and one p orbital hybridize?

• Two sp^2 hybrid orbitals

• Two sp hybrid orbitals

• Two sp^3 hybrid orbitals

• Two p orbitals