Name
Date
Class
Atoms and Bonding
On a separate sheet of paper, use the periodic table to create electron dot diagrams
for barium (Ba), carbon (C), cesium (Cs), iodine (I), krypton (Kr), phosphorus (P), and
strontium (Sr).
Name
Date
Class
Atoms and Bonding
Understanding Main Ideas
Look at the diagram below. Then answer the following questions in the space provided.
1. How many protons does a nitrogen atom have? _______________
2. How many valence electrons does a nitrogen atom have? _______________
3. Is nitrogen reactive or stable? ______________________________
4. Neon (Ne), which has an atomic number of 10 is in Group 18 in the periodic table. To which
group does nitrogen belong? _______________
5. The element directly below nitrogen in the periodic table is phosphorus (P). How many
valence electrons does phosphorus have? _______________
6. Will the properties of nitrogen be more similar to the properties of neon or the properties
of phosphorus? Explain. ____________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
Building Vocabulary
If the statement is true, write true. If the statement is false, change the underlined word
or words to make the statement true.
7. _______________ An element’s reactivity is determined by the
number of protons found in an atom of the element.
8. _______________ The force of attraction that holds two atoms
together is called a(n) chemical bond.
9. _______________ In a(n) periodic table, dots around an
element’s symbol indicate the number of valence electrons in
an atom.
Name
Date
Class
Elements Forming Compounds
A fluoride (F) ion has a charge of 1–. An aluminum (Al) ion has a charge of 3+. On a
separate
sheet of
paper,
explain
how fluorine and aluminum would exchange valence
electrons to form an ionic compound. Then write the compound’s chemical formula and
name the compound.
Name
Date
Class
Elements Forming Compounds
Understanding Main Ideas
Fill in the blank to complete each statement.
1. Negative ions form when atoms _______________ valence electrons.
2. In the formation of an ionic compound, a metal atom is most likely to
_______________ valence electrons.
3. Ionic compounds form because _______________ charges
attract.
Answer the following questions in the spaces provided. You may use a periodic table.
4. A potassium ion has a charge of 1+. A sulfide ion has a charge of 2–.
What is the chemical formula for potassium sulfide?
5. Name the following compound: MgO.
Building Vocabulary
Write a definition for each of these terms on a separate piece of paper.
6. ion
7. molecular compound
8. ionic bond
9. ionic compound
10. chemical formula
Name
Date
Class
Classifying Chemical Compounds
On a separate sheet of paper, explain what a salt is and how one is formed.
Name
Date
Class
Classifying Chemical Compounds
Understanding Main Ideas
Answer the following questions in the spaces provided.
1. Why do ionic compounds have high melting points and boiling points?
2. Why are electrical wires insulated with plastic or rubber?
3. Why do salts share the same properties of ionic compounds?
4. If a substance is found at the high end of the pH scale, is it an acid or a base?
Building Vocabulary
Match each term with its definition by writing the letter of the correct definition in the
right column on the line beside the term in the left column.
5. ___ crystal
a. a compound that changes color when it comes in
contact with an acid
6. ___ neutralization
b. a reaction between an acid and a base that results in
the formation of a salt
7. ___ pH scale
8. ___ acid
9. ___ base
c. a compound that tastes bitter, feels slippery, and
turns red litmus paper blue
d. a compound that reacts with metals and carbonates,
tastes sour, and turns blue litmus paper red
e. an orderly, three-dimensional arrangement
10. ___ indicator
f.
a measurement of acids and bases