WorksheetsChemical Compounds Counting Atoms
Total questions: 20
Worksheet time: 16mins
How many Hydrogen atoms are in 4H2O?
6
8
2
4
How many Oxygen atoms are in H2O?
1
2
0
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 Nitrogen atoms are in the in H2C3O4N5?
2
3
4
5
How many Aluminum atoms are in Al2O3?
3
2
5
1
How many elements are present in this compound? (Careful!)
Mg2As3COHNi2
2
4
6
10
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
