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What molecule contains two or more atoms of the same element in definite proportions?

  1. Compound molecule

  2. Elemental molecule

  3. Inorganic molecule

  4. Organic molecule

The correct answer is: Elemental molecule

An elemental molecule consists of two or more atoms of the same element in definite proportions. This means that in an elemental molecule, the atoms are all of the same type, making it different from a compound molecule which is made up of different types of atoms bonded together. Inorganic and organic molecules involve different elements in their structures, so they do not fit the definition of having the same element in definite proportions like an elemental molecule.