The question asks to identify a set of elements where the number of electrons in their outermost orbit are 4, 5, and 6. This refers to the valence electrons of these elements. - Silicon (Si) has 4 valence electrons ($3s^2 3p^2$). - Nitrogen (N) has 5 valence electrons ($2s^2 2p^3$). - Sulfur (S) has 6 valence electrons ($3s^2 3p^4$). The set (Si, N, S) thus contains elements with 4, 5, and 6 valence electrons respectively.
61 Which set of the elements have 4, 5 and 6 electrons in their outer most orbit? (1) C, Si, Cl (2) B, C, N (3) O, F, S (4) Si, N, S
Asked in Sub Inspector Comb. Comp. Exam 2016 · Topic: Atomic Structure (Electronic Configurations of Multi-electron Atoms and Ions)
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