Polarity

Question 1

A bond results from the attraction of nuclei for electrons
– All atoms trying to achieve a stable octet
* IN OTHER WORDS
– the p+
in one nucleus are attracted to the e- of another atom
* Electronegativity

Answer 1

Chemical Bond

Question 2

*Pairs of e- are shared
between non-metal atoms
* electronegativity difference < 2.0

Answer 2

Covalent Bonding

Question 3

*electrons are transferred between valence
shells of atoms
*Crystals Always formed between metals and nonmetals

Answer 3

IONic Bonding

Question 4

Relative ability of an atom to attract electrons
in a chemical bond
* Trend:
– Increases across (left to right) a period
– Decreases down a group

Answer 4

Elecronegativity

Question 5

has the highest electronegativity
value

Answer 5

Fluorine

Question 6

Types of covalent bonds

Answer 6

1. Non-polar covalent
2. Polar covalent

Question 7

-equal sharing of
electrons
-Usually occurs when two identical atoms are bonded together.
* Examples: H2, O2. N2, Cl2, Br2. I2 , F2

Answer 7

Non-polar covalent

Question 8

-unequal sharing of
electrons
-Unequal sharing caused by 2 elements
with different electronegativities
(different abilities to attract electrons).

Answer 8

Polar covalent:

Question 9

Properties of Molecules

Answer 9

Polar molecules has higher boiling point and melting point than non-polar molecules.