Counting Atoms
Partner Activity
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Materials Needed for Each Pair of Students:
• 2 dice
• Several bingo chips in 2 different colors
• 1 counting atoms game board (below)
• 2 sheets of paper, 1 per student
1.
Directions:
You and your partner will take turns rolling the dice. When it is your
turn, you will roll the dice & answer the question in a corresponding
box. For example: if a 4 & a 5 are rolled, you can choose to answer
question 4,5 or 5,4. *If a 6 is rolled, you can pick any number 1-5!*
2. BOTH students need to answer the same questions on their own sheet
of paper. If the student who rolled the dice answers a question
correctly, he/she gets to place a bingo chip in that box. If the student
who rolled the dice answers incorrectly & their partner answers it
correctly, that student gets to place a bingo chip in the box.
3. play until one of you gets 5 boxes in a row (horizontally, vertically, or
diagonally).
Have fun! 
© Science Chick 2016
Counting Atoms Game Board
Write the quantity of atoms of each element in the molecules below.
1
2
3
4
5
1
Ca3(PO4)2
5P2O3
4Zn(NO3)2
4Al2(CO3)3
5Fe3(PO4)2
2
3Sr(MnO4)2
3K2ZnO2
3N4O1 0
Ca(C2H3O2)2
4Al(OH)3
3
2(NH4)3N
1 2NaBr
5Ga2(Cr2O7)3
4Fe2O3
6Ba(MnO4)2
4
5Al2(SiO3)2
6Cu2SeO4
4Ca(OH)2
5Mg3(PO4)2
5N2O4
5
5BaC4H4O6
9Au(NO2)2
4Cu(HSO3)2
2KrCl6
7P2O5
© Science Chick 2016
Counting Atoms Game Board
Answer Key
1
2
3
4
5
1
Ca – 3
P-2
O-8
P – 10
O – 15
Zn – 4
N-8
O - 24
Al – 8
C – 12
O - 36
Fe – 1 5
P – 10
O – 40
2
Sr – 3
Mn - 6
O – 24
K–6
Zn - 3
O–6
N – 12
O – 30
Ca - 1
C–4
H-6
O–4
Al – 4
O – 12
H – 12
3
N-8
H – 24
Na – 1 2
Br – 1 2
Ga – 10
Cr – 30
O – 1 05
Fe - 8
O – 12
Ba – 6
Mn – 1 2
O – 48
4
Al – 10
Si – 1 0
O – 30
Cu – 1 2
Se - 6
O – 24
Ca – 4
O-8
H–8
Mg – 1 5
P – 10
O – 40
N – 10
O – 20
5
Ba - 5
C – 20
H – 20
O – 30
Au – 9
N – 18
O – 36
Cu - 4
H–8
S-8
O – 24
Kr – 2
Cl – 1 2
P – 14
O – 35
© Science Chick 2016
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