Roentgenium #111

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QUIZ CONTEST

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Quiz on Roentgenium

1 / 5

After whom Roentgenium is named?

2 / 5

How many known isotopes if Roentgenium are there ?

3 / 5

When was the name Roentgenium accepted?

4 / 5

Roentgenium is a man-made element.

5 / 5

Roentgenium is used in X-ray instrument.

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