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Binary Ionic Compounds

Total questions: 20

Worksheet time: 21mins

Name
Class
Date
1.
What is the formula for magnesium phosphide?
a)
Mg3P2
b)
Mg2P3
c)
Mg2PO3
d)
Mg3(PO3)2
2.
The chemical formula for an ionic compound of potassium and oxygen is
a)
KO.
b)
K2O.
c)
K2O2.
d)
KO2.
3.
Which is most likely to form a negative ion?
a)
an element from group 17
b)
a metal
c)
an element from group 1
d)
an element with atoms that have eight valence electrons
4.
Name this compound: 
NaBr
a)
Bromide sodide
b)
Sodium bromide
c)
Sodium bromate
d)
Sodium bromite
5.

SNa2

a)

Disodium sulfide

Disodium sulfide

b)

Sodium sulfide

c)

Sodium monosulfide

d)

Sulfur sodide

6.
What formula results when Ca+2  and  Br- ions bond?
a)
Ca2Br2
b)
CaBr
c)
Ca(br)2
d)
CaBr2
7.
What would be the proper chemical formula for combining Al3+ and l- :
a)
Al l3
b)
Al3l
c)
Al l
d)
Al3 l3
8.
How do the following two elements bond together?
Cr3+  O2-         
a)
CrO
b)
Cr3O2
c)
Cr2O3
d)
CrO3
9.
How do the following two elements bond together?
K1+  S2- 
a)
KS
b)
K8S
c)
K6S3
d)
K2S
10.
Li+ combines with P3-  to form
a)
LiP
b)
Li3P
c)
LiP3
d)
Li3P3
11.
Na +  and  S -2
a)
Na2S
b)
NaS2
c)
Na2S2
d)
NaS
12.
K +  and  N-3
a)
KN
b)
KN3
c)
K3N3
d)
K3N
13.
How many valence electrons does a bromine atom have?
a)
1
b)
2
c)
6
d)
7
14.
What is the charge of an atom that has lost one electron?
a)
-1
b)
-2
c)
+1
d)
+2
15.
If an element has 3 valence electrons, what charge will likely form on its ion ?
a)
+3
b)
+5
c)
-3
d)
-5
16.
A phosphorus atom needs to gain ___ electrons to achieve a full octet.
a)
3
b)
4
c)
6
d)
5
17.

Hector claims that a single sodium ion and a single oxygen ion do not bond together to form a stable binary ionic compound. Is he correct? Why or why not?

a)

Hector is incorrect. The two ions have opposite charges, so they will bond together in a binary ionic compound.

b)

Hector is incorrect. The two ions have more than eighteen protons, so they will bond together in a binary ionic compound.

c)

Hector is correct. The sum of the charges of the two ions must be zero in order for them to form a stable ionic compound.

d)

Hector is correct. The sum of the protons of the two ions must be divisible by eight in order for them to form a stable ionic compound.

18.

Potassium (K), an alkali metal, and magnesium (Mg), an alkaline earth metal, both combine readily with bromine (Br), a halogen. What compound will each element (K and Mg) most likely form with bromine?

a)

KBr and Mg2Br

b)

KBr and MgBr

c)

K2Br and Mg2Br

d)

KBr and MgBr2

19.

Unknown element W has 2 valence electrons. Unknown element X has 7 valence electrons. Which formula shows the most likely outcome when elements W and X react?

a)

WX

b)

WX2

c)

W2X

d)

W2X2

20.
What is the correct formula for calcium oxide?
calcium = Ca
oxygen = O
a)
Ca2O
b)
CaO
c)
Ca2O2
d)
Ca1O1

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