Hydrogen_Anirjit_Cipla

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2. What is the most abundant element in the Universe?
3. What is the name of the radioactive isotope of Hydrogen?
5. What is formed when two atoms of Hydrogen is combined with one atom of Oxygen?
6. What percent of all atoms in the Universe is Hydrogen?
9. What is the colour of Hydrogen?
10. What is the atomic number of Hydrogen?

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1. Who discovered Hydrogen?
4. How many isotopes does hydrogen have?
7. Hydrogen is mixed with which element to form Ammonia
8. The word Hydrogen has its origin in which country?

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