Chemistry 8.3 Vocab

Question 1

Bonding orbital

Answer 1

Molecular orbital that can be occupied by two electrons of covalent bonds

Question 2

Sigma bond

Answer 2

Two atomic orbitals combine to form molecular orbital that is symmetrical around axis connecting two atomic nuclei

Question 3

Pi bond

Answer 3

When pi molecular orbital is filled with two electrons; bonding electrons are to be found in sausage-shaped regions above and below bond axis of bonded atoms

Question 4

Tetrahedral angle

Answer 4

Hydrogens in methane are at four different corners of geometric solid-regular tetrahedron; H-C-H angles are at 109.5 degrees

Question 5

VSEPR theory

Answer 5

Repulsion between electron pairs causes molecular shape to adjust so valence-electron pairs are as far apart as possible

Question 6

Hybridization

Answer 6

Orbital hybridization provides info about molecular bonding and molecular shape; several atomic orbitals mix to form same total number of equivalent hybrid orbitals

Question 7

Molecular orbitals

Answer 7

When two atoms combine, this model assumes that their atomic orbitals overlap; orbitals that apply to the entire molecule