A sigma bond is formed by the overlap of atomic orbitals.
True
Bonds can be sigma or pi; no antibonding in Valence Bond Theory.
True
In transition metals, which are considered valence electrons?
Electrons in the ns and (n-1)d orbitals.
Ionic Bonds
Metal + Nonmetal (Normally)
Covalent Bond
Nonmetal atoms (Normally)
Formal Charge equation
FC=X-(Z/2)-Y where X are the electrons in the free atom, Z are the shared electrons, and Y are nonbonding electrons
The octect rule only applies for the second row of the periodic table.
True
What are some exceptions to the octect rule?
- When the number of total electrons is an odd number, no full octects are possible
- NO, BF3 are electron deficient
- PCl5 has an expanded octect (possible for 3rd row and below)
Molecular Geometries name molecules looking ONLY at bonds.
True
Order of polarity of Hydrogen halides in gas form
HF>HCl>HBr>HI
Order of polarity of Hydrogen halides in water
HF
The bonds in a molecule can be polar but the overall molecule can be nonpolar.
True; because of the overall dipole moment
Bond Order equation
Bond Order=(Total # of electron pairs used for a type of bond)/(Total # of bonds of that type)
Bond length depends on size of bonded atoms
True; bigger atoms show longer bonds
