Chapter 7 Practice Name_______________________________
Matching
Match each description in Column
B to the correct term in Column A.
Column A
_____ 1.
chemical formula
_____ 2.
valence electrons
_____ 3.
electron dot structure
_____ 4.
octet rule
_____ 5.
formula unit
_____ 6.
ionic bonds
_____ 7.
ionic compounds
_____ 8.
anions
_____ 9.
cations
Column B
A.
compounds composed of
cations and anions
B.
the attraction of
free-floating valence electrons for positively charged metal ions
C.
the lowest whole-number
ratio of ions in an ionic compound
D.
the electrostatic
attraction that binds oppositely charged ions together
E.
the number of ions of
opposite charge that surround the ion in a crystal
F.
negatively charged ions
G.
shows the kinds and
numbers of atoms in the smallest representative unit of a substance
H.
a diagram that shows
valence electrons as dots
I.
a negative ion formed
when a halogen atom gains an electron
J.
In forming compounds,
atoms tend to react so as to acquire the stable electron configuration of a
noble gas.
K.
electrons in the highest occupied energy level of an element’s atoms.
L.
a mixture of two or more
elements, at least one of which is a metal
M.
positively charged ions
Answer the following in the
space provided.
10. What is the relationship
between the group number of the representative elements and the number of
valence electrons?
11. How many electrons will each
element gain or lose in forming an ion? State whether the resulting ion is a
cation or an anion.
a. strontium c. tellurium e. bromine
b.
aluminum d.
rubidium f.
phosphorus
12. Give the name and symbol of
the ion formed when
a. a chlorine atom gains one
electron. b. a potassium atom loses one electron.
c. an oxygen atom gains two
electrons. d. a barium atom loses two electrons.
13. How many electrons are lost
or gained in forming each of the following ions?
a. Mg
b. Br c. Sr d.
Fe
14. Classify each of the
following as a cation or an anion.
a. Na+ c.
I-
e. Ca2+
b. Cu2+ d. O2- f. Cs
16. Write the electron configuration
for each of the following atoms and ions.
a.
Ca b.
Na+ d.
phosphide ion
15. For each element below,
state (i) the number of valence electrons in the atom, (ii) the electron dot
formula, and (iii) the chemical symbol for the ion.
|
|
Na |
O |
N |
Ca |
|
Valence electrons |
|
|
|
|
|
Electron dot diagram |
|
|
|
|
|
Symbol for the ion |
|
|
|
|
17. Use electron dot structures to
show how the following form ionic compounds, and write the formula for the compound .
a. sodium and bromine d. calcium and iodine
b. magnesium and oxygen e. aluminum and sulfur
c. Potassium and sulfur f. gallium and phosphorus
18. Which of these combinations
of elements is likely to react to form ionic compounds?
a. sodium and magnesium c.
potassium and iodine
b. barium and sulfur d.
oxygen and argon
19. Write an electron
configuration for the following transition metals, then
write one that describes the ion it forms.
a.
Sc Sc3+
b.
Cd Cd2+
c.
Ni Ni3+