MARISOL M. HERNDON
Name __________________________________________________________
Score:_____/44 points
Atoms vs. Ions worksheet
Cations
Anions
Have a positive charge because they
LOSE
__________________
electrons (1pt)
Have a negative charge because they
GAIN
__________________
electrons (1pt)
Ion symbol
To write the ion symbol, you must write the element symbol with the charge written on the top right.
Example: Ca2+, Zn2+, Ag1+
For each box, use the Bohr diagram to show the number of electrons in a standard atom. Then, you will need to
determine if the atom would lose or gain electrons and draw the Bohr diagram to show the number of
electrons in the ion. The first one has been done for you.
Lithium
Lithium Atom
Lithium Ion
Lithium Ion
Atomic #: 3
Atomic #: 3
Electrons: 2
Electrons: 3
Cation/Anion: Cation
Valence Electrons: 1
Ion Symbol: Li1+
2 pts/box
Oxygen
1 pt/box
Oxygen Atom
2 pts/box
Oxide Ion
1 pt/box
Oxide Ion
Atomic #: 8
Atomic #: 8
Electrons: 10
Electrons: 8
Cation/Anion: Anion
Valence Electrons: 6
Ion Symbol: O2-
Nitrogen
Nitrogen Atom
Nitrogen Ion
Atomic #: 7
Atomic #: 7
Electrons: 10
Electrons: 7
Cation/Anion: Anion
Valence Electrons: 5
Ion Symbol:
N 3-
Nitrogen Ion
Sodium
Sodium Atom
Sodium ion
Sodium ion
Atomic #: 11
Atomic #: 11
Electrons: 10
Electrons: 11
Cation/Anion: Cation
Valence Electrons: 1
Ion Symbol: Na1+
Phosphorus
Phosphorus Atom
Phosphorus ion
Phosphorus ion
Atomic #: 15
Atomic #: 15
Electrons: 18
Electrons: 15
Cation/Anion: Anion
Valence Electrons: 5
Ion Symbol:
Chlorine
Chlorine Atom
P 3-
Chlorine ion
Chlorine ion
Atomic #: 17
Atomic #: 17
Electrons: 18
Electrons: 17
Cation/Anion: Anion
Valence Electrons: 7
Ion Symbol: Cl
Magnesium
1-
Magnesium Atom
Magnesium ion
Magnesium ion
Atomic #: 12
Atomic #: 12
Electrons: 10
Electrons: 12
Cation/Anion: Cation
Valence Electrons: 2
Ion Symbol:
Sulfur
Mg 2+
Sulfur Atom
Sulfur ion
Atomic #: 16
Atomic #: 16
Electrons: 18
Electrons: 16
Cation/Anion: Anion
Valence Electrons: 6
Ion Symbol:
S 2-
Sulfur ion
Name
MARISOL M. HERNDON
Score:
Acids and Bases Key Term Review
PART A Deci de whether the underl i ned term i n each sentence i s used correctl y. If
correct, wri te true i n the space provi ded. If not correct, change the underl i ned term to
a term i n the box.
acid
indicator
neutralization
base
ionization
nonelectrolyte
electrolyte
neutral
salt
TRUE
_________________
TRUE
_________________
TRUE
IONIZATION
_________________
AN ALKALI
_________________
_________________
1. A nonelectrolyte is a substance that conducts an electric current when it is
dissolved in water.
2. A salt is a compound formed from the negative ion of an acid and the
positive ion of a base.
3. A n indicator is a substance that changes color in acids and bases.
4. Neu tralization is the formation of ions.
5. A base is a substance that reacts to release hydrogen ions.
PART B Match each term i n Column B wi th i ts descri pti on i n Column A. Wri te the
correct l etter i n the space provi ded.
Column B
Column A
f
g
________
________
e
________
d
________
a
c
________
h
________
________
b
________
1. neither acidic nor basic
a. pH scale
2. substance that does not conduct an electric current when it is
dissolved in water
b. ionization
3. negative ion made of one atom of hydrogen and one atom of
oxygen
c. base
d. neutralization
4. reaction of an acid and a base to produce a salt and water
e. hydroxyl
5. measure of the concentration of hydrogen ions in a solution
f.
6. substance that reacts to release hydroxide ions
g. nonelectrolyte
7. compound formed from the negative ion of an acid and the
positive ion of a base
h. salt
neutral
8. formation of ions
Concepts and Challenges in Physical Science, Teacher’s Resources CD-ROM
(c) by Pearson Education, Inc./Globe Fearon/Pearson Learning Group. All rights reserved.
Acids and Bases
/13 pts