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WorksheetsPSB Counting Atoms
Total questions: 20
Worksheet time: 11mins
How many Hydrogen atoms are in 4H2O?
6
8
2
4
How many Magnesium atoms are in 10MgCl2?
10
5
20
How many atoms are there TOTAL in H2SO4 ?
6
5
7
3
How many Sodium atoms are in 6NaCl?
1
12
6
How many Nitrogen atoms are in (NH₄)₂CrO₄?
1
2
8
16
What is C2H8O ?
Element
Letters
Numbers
Compound
How many atoms of Hydrogen are in this compound?
1
2
3
4
How many Oxygen atoms are in Al₂(SO₄)₃?
4
12
7
24
How many Hydrogen atoms in 3(NH₄)₂CrO₄?
4
2
8
24
A subscript is the small number below the element symbol that tells the number of _______ of that element.
atoms
valence electrons
protons
elements
How many atoms are present if there is no subscript following the element symbol?
0
2
only 1
1 million
Are there any compounds on the periodic table?
yes there are many
no because only elements are on the periodic table
I think they are?
there is no way to tell
The coefficient in 3H2O is:
6
5
3
2
Which of the following could represent O2?
A
B
C
D
Which of the following could represent HCl?
A
B
C
D
Which of the following could represent NaHCO3 ?
A
B
C
D
Which of the following could represent C3H8?
A
B
C
D
Which of these is not a compound?
A
B
C
D
