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JEE Main Chemistry question

ChemistryClassification of Elements and Periodicity in PropertiesJEE Main

Atomic numbers of some elements are given below. The number of elements from the following that will be placed in group 2 of the modern periodic table is . 3, 4, 7, 12, 18, 20, 26, 32, 38

Answer: 4

Solution

Group 2 elements have outer configuration : atomic numbers 4 (Be), 12 (Mg), 20 (Ca) and 38 (Sr) satisfy

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Question ID VK-133908