1. Ions and Ionic Bonds

2. Ion = Atom that has lost or gained electrons; has a charge (+ or -)
Atoms that Lose electrons
Have a positive charge
= +, 2+, 3+, etc.
Called cations (“Cat Pos”)
Atoms that Gain electrons
Have a negative charge
= -, 2-, 3-, etc.
Called anions

3. Electrons are transferred
Chemical bonds
Attractive force that holds atoms or ions together
Ionic Bond
bond formed by the attraction between oppositely charged ions
There is an electrostatic attraction between the ions
Electrons are transferred
Example: Na and Cl
Cl takes an electron from Na
Cl becomes Cl-
Na becomes Na+
Na+ is attracted to Cl-
Form ionic compound NaCl

4. Ionic bonds occur between a metal and a nonmetal
Metals on left side of Periodic Table
Nonmetals on right side of Periodic Table
Most ionic compounds are called salts
Example: Lithium combines with Bromine to become LiBr
Li has 1 valence electron (has 1 extra)
Br has 7 valence electrons (needs 1)
Br takes Li extra valence electron
Br becomes Br-
Li becomes Li+
Li+ is attracted to Br- and form an ionic bond
LiBr is the ionic compound that is formed

7. Exit Ticket Questions 1 - 4

8. An atom that has gained or lost one or more electrons
is called a(n):
a. proton
b. ion
c. neutron
d. compound

9. An atom that has LOST an electron has a _______ charge
and is called a(n) ________.
a. Neutral; neutron
b. Negative; cation
c. Positive; cation
d. Negative; anion

10. An atom that has GAINED one or more electrons has a
____________ charge and is called a(n) _______.
a. Neutral; neutron
b. Negative; cation
c. Positive; cation
d. Negative; anion

11. Ionic bonds occur between a _______ and a ________
and are usually called ________.
a. Metal; non-metal; salts
b. Non-metal; non-metal; cations
c. Noble gas; non-metal; anions
d. Metal; metal; metals