Chem lewis structures

There are _ _ _ _ _ valence electrons in the molecule PF 6 - . Take note of the charge on the molecule.

42

If a molecule has polar bonds, is the molecule always polar? YES or NO

NO

Which of the following molecules are polar?

SO 3 2-

The molecule BrF 5 is an example of

a central atom with more than an octet of electrons

According to the VSEPR theory, which of the following would be counted as one electron domain on a Lewis structure?

all of the above

The exceptions to the Octet Rule include

all of the above are valid exceptions to the octet rule

The electron domain geometry of a molecule shows the arrangement of ___________ around the central atom and assumes that the best ED geometry ____________ the repulsions between the electrons.

bonding and nonbonding pairs of electrons; minimizes

The Lewis structure for N 2H 2 shows

each nitrogen has one nonbonding pair of electrons

Assuming that all of the peripheral atoms are identical, which of the following molecular geometries are symmetrical?

only a and b are symmetrical

If a central atom has five atoms bonded to it with no nonbonding pairs of electrons, its hybridization pattern must be __________.

sp 3d

What is the molecular geometry of NH 3Cl +?

tetrahedral

In order to have an octet of electrons, a carbon atom could have which combination of covalent bonds

two double bonds with two O atoms