H₂O₂ and heavy water were discovered by _ and _, respectively.
Correct answer: A. Thenard, Urey
- A. Thenard, Urey
- B. Urey, Rutherford
- C. Urey, Thenard
- D. Aston, Chadwick
Explanation
Hydrogen peroxide (H₂O₂) was first isolated and described by Louis Jacques Thénard in 1818. Heavy water (D₂O) was discovered by Harold Urey in 1931, for which he won the Nobel Prize.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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