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Roentgenium Test

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1.
1 point
When was Roentgenium discovered?
2.
1 point
What is the half life for Roentgenium?
3.
1 point
What is the 111th element?
4.
1 point
How many neutrons are in Roentgenium?
5.
1 point
How many protons are in Roentgenium?
6.
1 point
How many electrons are in Roentgenium?
7.
1 point
What laboratory discovered Roentgenium?
8.
1 point
What is Roentgenium's atomic mass?
9.
1 point
R is the atomic symbol for Roentgenium.
10.
1 point
Who is Roentgenium named after?
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