Group 1A and 11A are known as:
Correct answer: C. s block elements
- A. Alkali
- B. Alkaline earth
- C. s block elements
- D. P block elements
Explanation
Group 1A and 11A elements are known as s-block elements. This is because their valence electrons occupy the s-orbital. Alkali metals (Group 1A) have one valence electron in the s-orbital, while alkaline earth metals (Group 11A) have two valence electrons in the s-orbital.
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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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