Question

*An element has the outermost electronic configuration 3s², 3p⁵. Its group will be:* 1️⃣ 2 2️⃣ 5 3️⃣ 15 4️⃣ 17​

Answer 1

17

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Answer 2

The group is 17.

• An element has the outermost electronic configuration 3s², 3p⁵. Thus, the electronic configuration of the element is
• ${1s}^{2} {2s}^{2} {2p}^{6} {3s}^{2} {3p}^{5}$
• Thus, the atomic number is 2+2+6+2+5=17. Hence the element is Cl. It resides in group 17 of the modern periodic table.
• Cl is a halogen element and has a valency of 1.
• Thus, the correct option is 4.