1. Which One Doesn’t Belong?

2. KBr CO MgCl2 MgO Find the reason one of these does not belong.
Hint: what kinds of
compounds do you see?
KBr CO
MgCl2
MgO 1 2 3 4

3. Sodium chloride Scandium nitride Aluminum oxide Magnesium oxide
Find the reason one of these does not belong.
Hint: write the formulas
Scandium nitride
Sodium chloride
Aluminum oxide
Magnesium oxide 1 2 3 4

4. NaCl MgCl2 BeCl2 BeCl Find the reason one of these does not belong.
Hint: check that these can
exist 1
NaCl 2
MgCl2 3
BeCl2 4
BeCl

5. Calcium chloride Beryllium chloride Magnesium chloride Sodium chloride
Find the reason one of these does not belong.
Hint: write the formulas 1
Calcium chloride 2
Beryllium chloride 3
Magnesium chloride 4
Sodium chloride

6. Manganese (II) fluoride
Find the reason one of these does not belong.
Hint: look at the ion charges 1
Lithium fluoride 2
Sodium fluoride 3
Magnesium fluoride 4
Manganese (II) fluoride

7. NaCl MgCl2 BeCl2 FeCl2 Find the reason one of these does not belong.
Hint: write the names 1
NaCl 2
MgCl2 3
BeCl2 4
FeCl2

8. NaOH NaF MgCl2 MgO Find the reason one of these does not belong.
Hint: poly … 1
NaOH 2
NaF 3
MgCl2 4
MgO

9. Find the reason one of these does not belong.
Hint: poly …. 1
NH4OH 2
CaCO3 3
CaCl2 4
(NH4)2CO3

10. FeO FeS FeCl3 FeCl2 Find the reason one of these does not belong.
Hint: write the names 1
FeO 2
FeS 3
FeCl3 4
FeCl2

11. Find the reason one of these does not belong.
Hint: do polyatomic ions break
apart and make new things
when they participate in
forming a compound?
Or are they treated as
one big ion that you
don’t break apart?
Only one of these exists 1
Mg(OH)2 2
MgOH 3
MgOH2 4
MgO2H2

12. MnO MnCO3 MnPO4 MnS Find the reason one of these does not belong.
Hint: write the names 1
MnS 2
MnO 3
MnCO3 4
MnPO4

13. Copper (II) hydroxide Calcium hydroxide Copper (I) hydroxide
Find the reason one of these does not belong.
Hint: write the formulas 1
Magnesium hydroxide 2
Copper (II) hydroxide 3
Calcium hydroxide 4
Copper (I) hydroxide