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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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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?
 
The electronic configuration of elements with:
  • Atomic number (12) =
  • Atomic number (19) =
  • Atomic number (20) =
  • Atomic number (21) =
  • Atomic number (38) =
Elements with atomic numbers 12, i.e., magnesium (Mg) and 38, i.e., strontium (Sr), will have similar physical and chemical properties as elements with atomic numbers 20, i.e., calcium (Ca).