Easy
Medium
Hard
100
What the atomic symbol Hg stand for? (no books)
Mercury
100
True or False The atomic number of He is 3?(no books)
False
100
What is the atomic weight of Hf? ( no books)
178.49
200
What does the atomic symbol O stand for? (no books)
Oxygen
200
What is the atomic number of He? (no books)
2
200
What is the atomic weight of Rb? (no books)
85.468
300
What does the atomic symbol Ni stand for? ( no books)
Nickel
300
What is the atomic number of Si? (no books)
14
300
What is the atomic weight of Oxygen(O)? ( no books)
15.9994
400
What does the atomic symbol Ti stand for? (no books)
Titanium
400
True or false The atomic number of Mn is 25? (no books)
True
400
What is the atomic weight of Pr? (no books)
140.9077
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