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20 questions
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 Nitrogen atoms are in (NH₄)₂CrO₄?
1
2
8
16
How many Oxygen atoms are in Al₂(SO₄)₃?
4
12
7
24
How many elements are present in this compound? (Careful!)
Mg2As3COHNi2
2
4
6
10
Subatomic particles with a negative charge
Electrons
Neutrons
Protons
Quarks
What is the atomic mass of Neon?
10
20.18
10.18