The connectivity for PCl_3 is shown in this Lewis symbol figure. Which statement

Question

The connectivity for PCl_3 is shown in this Lewis symbol figure. Which statement correctly describes the number of valence electrons to include? Each Cl atom has 7 valence electrons, and the P atom has 5 valence electrons, and so the Lewis structure for PCl_3 will include 26 electrons. Each Cl atom has 6 valence electrons, as does the P atom, and so the Lewis structure for PCl_3 will include 24 electrons. Each Cl atom has 7 valence electrons, and the P atom has 3 valence electrons, and so the Lewis structure for PCl_3 will include 24 electrons. Each Cl atom has 7 valence electrons and so the Lewis structure for PCl_3 will include 21 electrons.

Explanation / Answer

Since Chlorine belongs to Gr VIIA of periodic table it possess 7 valence electrons and Phosphorous belongs to Gr VA, and hence contains 5 valence electron.

Thus, each chlorine atom has 7 valence electron and the phosphorous atom has 5 valence electrons

Total valence electrons in PCl3 = (1 x 5) + (3 x 7) = 26 electrons

statement 1 is correct.

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