in the morden periodic table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21 and 38. which of these have physical and chemical properties resembling calcium?
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19 because both are 1st and 2nd group elements
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Explanation:
The element with atomic number 12 has same chemical properties as that of calcium. This is because both of them have same number of valence electrons (2).
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