MCQ
Electronic configuration and metallic character MCQ - Practice Questions with Answers
Solve 1 Electronic configuration and metallic character questions for RAS/RPSC preparation.
Practice questions
Q1The electronic configurations of three elements A, B and C are: A - 2, 8; B - 2, 8, 7; and C - 2, 8, 2. Which of the following statements is true?
Explanation
Element A has the configuration 2, 8, so its outer shell is complete; it is a noble gas, not a metal. Element B has 2, 8, 7, meaning seven valence electrons, like a halogen, so it tends to gain one electron and is a non-metal. Element C has 2, 8, 2, meaning two valence electrons, typical of alkaline earth metals, so it is a metal. Therefore, the true statement is that B is a non-metal and C is a metal.
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