Question

12 an element with the electron configuration 1s2 2s2 2p1 would be in the s - block. (0.5 points) true false 13 identify which of the following groups has elements with a half - filled sublevel. (0.5 points) group 16 group 14 group 13 group 15

Explanation:

12

• The s - block elements have their outermost electrons in s - orbitals.
• For the electron configuration \(1s^{2}2s^{2}2p^{1}\), the outermost electron is in the \(2p\) orbital (not \(s\) orbital).
• Elements in the p - block have their outermost electrons in p - orbitals. So, an element with electron configuration \(1s^{2}2s^{2}2p^{1}\) is in the p - block, not s - block.

• Group 15 elements have the general electron configuration \(ns^{2}np^{3}\).
• The \(np\) sub - level has a capacity of 6 electrons. When there are 3 electrons (\(np^{3}\)), the \(np\) sub - level is half - filled.
• Group 16: \(ns^{2}np^{4}\), Group 14: \(ns^{2}np^{2}\), Group 13: \(ns^{2}np^{1}\) do not have half - filled sub - levels.

Answer:

B. False

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