Chapter 3 - Covalent Compounds (Part 2)

Front 1

_____ is a measure of an atom’s electron “hogginess” when sharing electrons in a covalent bond.

Back 1

Electronegativity

Front 2

What is represented by the numbers in blue?

Do we need to memorize these values?

Back 2

The numbers represent the electronegativity values for each element.

We do NOT need to memorize these, as they will be provided for us on the test.

Front 3

_____ _____ _____ occur when a bond is covalent and the electronegativity of the bonded atoms does not match. In turn, the electrons in that bond will be shared unequally.

Back 3

Polar covalent bonds

Front 4

What must be assigned to each atom in a polar covalent bond?

Back 4

Partial positive/negative charges.

Front 5

What symbol is used to indicate a partial positive or negative charge in a covalent bond?

Back 5

The small Greek symbol for Delta (see the picture).

Front 6

When a bond is covalent, and the electrons are shared equally, this is called a _____ _____ _____.

Back 6

Nonpolar covalent bond

Front 7

Covalent bonds are polar unless one of two things is true. Name them.

Back 7

1) The atoms being bonded are the same.

2) C and H are bonding.

Front 8

What determines whether a molecule is polar or nonpolar?

Back 8

The polarity of bonds will partially determine whether a structure is polar or nonpolar.

Front 9

The polarity of molecules will play a major role in determining what four physical properties of a compound?

Back 9

1) Melting Point
2) Boiling Point
3) Density
4) Water Solubility

Front 10

The shape of a molecule is determined by the bonding that occurs at the _____ _____.

Back 10

central atom

Front 11

This shape consists of a central atom with four individual electron pairs.

Back 11

Tetrahedron

Front 12

This shape consists of 3 single bonds and 1 non-bonded pair

Back 12

Trigonal Pyramid

Front 13

This shape consists of 2 single bonds and 2 non-bonded pairs.

Back 13

Bent 109 degrees

Front 14

This shape consists of 1 single bond and 3 non-bonded pairs.

Back 14

Linear

Front 15

This shape consists of 1 double bond and 2 single bonds.

Back 15

Trigonal Plane

Front 16

This shape consists of 1 double bond, 1 single bond, and 1 non-bonded pair.

Back 16

Bent 120 degrees

Front 17

This shape consists of 1 double bond and 2 non-bonded pairs.

Back 17

Linear

Front 18

This shape consists of 1 triple bond and 1 single bond.

Back 18

Linear

Front 19

This shape consists of 1 triple bond and 1 non-bonded pair.

Back 19

Linear

Front 20

This shape consists of 2 double bonds.

Back 20

Linear

Front 21

Are tetrahedrons polar, nonpolar, or both?

Back 21

If all of the outer atoms are the same, then they are nonpolar. If not, then they are polar.

Front 22

Are trigonal pyramids polar, nonpolar, or both?

Back 22

polar

Front 23

Are bent 109 degree shapes polar, nonpolar, or both?

Back 23

polar

Front 24

Are trigonal planes polar, nonpolar, or both?

Back 24

If all of the outer atoms are the same, then the shape will be nonpolar. If not, then they are polar.

Front 25

Are bent 120 degree shapes polar, nonpolar, or both?

Back 25

polar

Front 26

Are linear molecules polar, nonpolar, or both?

Back 26

If all of the atoms are the same, then they are nonpolar. If not, then they are polar.