Question

Which symbolizes a molecule of a compound?

A: H2O2


B: Ar2


C: F2


D: Si

Answer 1

The answer is A.H202

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Yerp

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Answer 2

`H_(2) O_(2)` symbolizes a molecule of a compound

Answer: Option A

Explanation:

A molecule contains one or more atoms which exists free in nature. It can be monoatomic (single atom), Na, Cu, C, N, H, O, etc. and diatomic (containing 2 atoms), are of two types

• Homo-diatomic- same atoms (
  `H_(2), O_(2), F_(2), B r_(2), C l_(2)`, etc.)
• Hetero-diatomic- different atoms (HCl, HF, NO, NaCl, etc.)
• Tri-atomic (containing 3 atoms)
  `\mathrm{H}_(2) \mathrm{O}, \mathrm{N}_(2) \mathrm{O}, \mathrm{Na}_(2) \mathrm{O}`, etc.
• Polyatomic (containing many atoms)
  `H_(2) S O_(4), P_(2) O_(5), H N O_(3)`, etc.

A compound consists of more one atom which are chemically combined in a fixed composition. So, here we see
`H_(2) O_(2)` is the molecule which symbolizes a compound since it contains more than one element, H and O present in it.