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JEE Main Chemistry question

ChemistryThe s-Block ElementsJEE Main

Not in JEE Main or NEET syllabus

The difference in atomic number between the first alkaline earth metal and the alkali metal belonging to the 3rd period is .

Answer: 7

Solution

The first (lightest) alkaline earth metal is beryllium, Z=4, and the

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Question ID VK-138169