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Q43 (CDS-I/2016) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Periodic table elements Answer Verified

Which one of the following statements is not correct?

Result
Your answer: —  Â·  Correct: C
Explanation

Hydrogen is the lightest known element in the periodic table, with an atomic number of 1. It is a non-metal element that typically exists as a diatomic molecule (H2) [1]. While the question asks for the incorrect statement, option 3 is false because hydrogen does have isotopes. Specifically, it has three naturally occurring isotopes: Protium (the most common, with no neutrons), Deuterium (one neutron), and Tritium (two neutrons) [2]. These isotopes are unique as they are the only ones in chemistry given specific names. Furthermore, hydrogen and oxygen can indeed form highly combustible or explosive mixtures over a wide range of concentrations, representing a significant safety hazard in industrial applications [1]. Therefore, the claim that hydrogen has no isotopes is the only incorrect statement among the choices provided.

Sources

  1. [1] https://www.sciencedirect.com/topics/engineering/hydrogen-explosion
  2. [2] https://www.energy.gov/science/doe-explainsdeuterium-tritium-fusion-fuel
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