How many Elements
How many Atoms
Find the Elements
Counting Atoms with Coefficients
Bonus Questions
100
H2O
2
100
H2O
3
100
Where is Gold on the periodic table? (Group # and Period #)
Group 11
Period 6
100
4MgBr2
12
100
What are the most common elements in the human body? (Name 4)
Oxygen (64%), Carbon (18.5%), Hydrogen (9.5%), and Nitrogen (3.3%)
200
C3+O3+Fe2
3
200
Ca(OH)2
5
200
Where is Ruthenium on the periodic table? (Group # and Period #)
Group 8
Period 5
200
5CaO4
25
200
How many Elements are on the Periodic Table
118
300
Mg3Si5+O4Li5B7P2
6
300
Ca(H2PO4)2
15
300
Where is Lead on the periodic table? (Group # and Period #)
Group 14
Period 6
300
6CuSO4
36
300
What element did Joseph Priestly discover in 1774?
Oxygen
400
C2 O3 (Fe3+I5) Cu12
5
400
C12H22O11
45
400
Where is Lanthanum on the Periodic table? (Group # and Period #)
Group 3
Period 6
400
4CuH10
44
400
What element is most commonly used to make nuclear energy?
Uranium
500
Fe2(SO4)3 + Cr2(SO4)3 + CO2 + H2O + K2SO4 + KNO3
8
500
C7H5(NO2)3
21
500
Where is Potassium on the Periodic table? (Group # and Period #)
Group 1
Period 4
500
3B2(CO3)3
42
500
Which is the most Abundant element in the universe
Hydrogen