The valence shell electronic configuration of an element is 4s2 , 4p1. To which group does the element belong?
Correct answer: D. Ⅲ-A
- A. Ⅰ-B
- B. Ⅱ-B
- C. Ⅰ-A
- D. Ⅲ-A
Explanation
The given valence shell electronic configuration is 4s2, 4p1. The group number is represented by valence electrons. Since valence electrons are (2 + 1 = 3), the group number is 3. Also, its valence subshell is "p", so it belongs to IIIA. As, elements of subgroup A are present in p block of periodic table. Hence, option D is correct.
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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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