The electronic configurations of some elements are given below. Recognize the element that belongs to group IIIA
Correct answer: C. 1s2 2s2 2p1
- A. 1s2 2s2 2p3
- B. 1s2 2s2 2p4
- C. 1s2 2s2 2p1
- D. 1s2 2s2 2p2
Explanation
The element that belongs to group IIIA (Group 13) of the periodic table is boron (B), so the correct option is C: 1s2 2s2 2p1.
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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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