MCQEasy1 mark
1
Choose the correct answers to the questions from the given options. (Do not copy the questions, write the correct answers only.)
Given below are four ions: Cl⁻, Li⁺, Al³⁺, K⁺ Identify the pair of ions which have the same electronic configuration. [Atomic number: Cl = 17, Li = 3, Al = 13, K = 19]
Topic: Periodic properties and trends
Previous-year question practice database
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Answer
Exam answer
(c) Cl⁻ and K⁺.
Explanation
Both have 18 electrons and electronic configuration 2,8,8.
In words
Cl⁻ and K⁺.
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