Which electronic configuration is that of elements of group 13 of the periodic table?
Correct answer: B. 1s2, 2s2, 2p1
- A. 1s2, 2s2 2p3
- B. 1s2, 2s2, 2p1
- C. 1s2, 2s2, 2p6, 3s2, 3p2
- D. 1s2, 2s2, 2p4
Explanation
The correct answer is Option B: 1s2, 2s2, 2p1 . This electronic configuration represents the core and valence electrons of a group 13 element. Elements in group 13 of the periodic table, such as Boron, have three electrons in their outermost shell, generally denoted as ns2np1. The other options correspond to elements in different groups: Option A corresponds to group 15, Option C to group 14, and Option D to group 16.
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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