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You are currently taking the Difficult Atoms quiz

At 0 degrees Centigrade which phase is Oxygen in?
Unknown
Gas
Liquid
Solid

How many Oxygen atoms are there in a Carbon Monoside molecule?
Two
Three
One
Four

What is the atomic weight of Gadolinium
164.930
157.250
145.000
157.250

What is the Freezing Point of Iron
1483 degrees C
1533 degrees C
2535 degrees C
1535 degrees C

What is the Freezing Point of Zirconium
1851 degrees C
1852 degrees C
1923 degrees C
2852 degrees C

What is the atomic weight of Selenium
72.640
85.468
78.960
78.960

What is the Boiling Point of Thorium
4812 degrees C
4789 degrees C
4790 degrees C
5790 degrees C

What is the Boiling Point of Lithium
1356 degrees C
1433 degrees C
1347 degrees C
2347 degrees C

What is the Freezing Point of Technetium
2194 degrees C
2200 degrees C
2283 degrees C
3200 degrees C

What is the symbol of Gallium
Ta
Pb
Ga
C

What is the symbol of Rutherfordium
Pt
K
Cu
Rf

What is the symbol of Erbium
Er
Tc
Rh
F

What is the atomic number of Polonium
86
88
82
84

What is the symbol of Dubnium
Cu
K
Cd
Db

At 0 degrees Centigrade which phase is Arsenic in?
Liquid
Solid
Unknown
Gas

What is the Boiling Point of Tantalum
5425 degrees C
6425 degrees C
5422 degrees C
5425 degrees C

What is the atomic number of Astatine
85
89
83
87

What is the atomic number of Gold
82
80
77
79

What is the symbol of Antimony
Er
Md
Sb
Sg

What is the symbol of Selenium
Se
Mo
Db
Rn