The elements with atomic numbers 9,17,35,53,85 and all
Correct answer: B. Halogens
- A. Noble gases
- B. Halogens
- C. Heavy metals
- D. Light metals
Explanation
The elements with atomic numbers 9 (fluorine), 17 (chlorine), 35 (bromine), 53 (iodine), and 85 (astatine) belong to the halogen group. Halogens are a group of non-metal elements in Group 17 (VIIA) of the periodic table. They share similar chemical properties, particularly their tendency to form salts when they react with 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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