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In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic number 12, 19, 21 and 38. Which of these have physical and chemical properties resembling calcium ?

In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic number 12, 19, 21 and 38. Which of these have physical and chemical properties resembling calcium ?

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 6228 Points
2 months ago
The electronic configuration of elements with : Atomic number 12 = 2, 8, 2 Atomic number 19 = 2, 8, 8, 1 Atomic number 20 = 2, 8, 8, 2 Atomic number 21 = 2, 8, 9, 2 Atomic number 38 = 2, 8, 18, 8, 2 Elements with atomic number 12 i.e., magnesium (Mg) and 38 i.e., strontium (Sr) will have similar physical and chemical properties as element with atomic numbers 20 i.e., calcium (Ca).

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