Pierrie Curie and Marie Curie isolated which radioactive element?
Correct answer: B. Radium
- A. Lithium
- B. Radium
- C. Boron
- D. Uranium
Explanation
The correct answer is Radium. Marie and Pierre Curie successfully isolated radium from pitchblende in 1902, contributing greatly to the understanding of radioactivity. Lithium and boron are non-radioactive elements, and uranium, while radioactive, was discovered earlier by Martin Klaproth, not by the Curies.
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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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