Which one of the following does not belong to alkaline-earth metals?
Correct answer: D. Rn
- A. Be
- B. Ra
- C. Ba
- D. Rn
Explanation
Radon is not an alkaline earth metal; it is a noble gas. Radon is a radioactive, colorless, and odorless gas that is formed naturally as a decay product of uranium. It belongs to Group 18 of the periodic table, the noble gases, and does not exhibit properties characteristic of alkaline earth metals.
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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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