The correct answer is Option 2 i.e Hydrogen.
| Noble gas |
- Noble gas is that gas that doesn't react with anything in general so it is also called inert gas.
- Noble gas that makes up Group 18 of the periodic table.
- As per modern theories of atomic structure; their outer shell of valence electrons is "full" so they have little tendency to participate in chemical reactions.
- Noble gases are Helium (He), Neon (Ne), Argon (Ar), krypton (Kr), Xenon (Xe), Radon (Rn), and Oganesson (Og).
- These gases are colourless, odourless, tasteless, nonflammable gases.
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