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Class 12 Tuition > Learn Chemistry > Which has a larger radius? (i)Mg or Ca (ii) S or Cl
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Which has a larger radius? (i)Mg or Ca (ii) S or Cl

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Learn Chemistry +1 Classification of Elements and Periodicity in Properties

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Dear Nadeem, For first one Calcium has a larger atomic radius than Magnesium. If you look on the period table you will notice Magnesium atomic number is 12, while Calcium is 20. Calcium(Ca) has 4 energy level while magnesium(Mg) has 3 Energy level. And the same way , Ionic radius varies depending...
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Dear Nadeem, For first one Calcium has a larger atomic radius than Magnesium. If you look on the period table you will notice Magnesium atomic number is 12, while Calcium is 20. Calcium(Ca) has 4 energy level while magnesium(Mg) has 3 Energy level. And the same way ,Ionic radius varies depending on spin states (low-spin and high spin) and coordination number.So For second one (S or Cl) generally both have the same electrons (repulsing each other the same amount), but the Cl Chlorine has more protons which would attract more. So, the general answer is the Cl will become a tighter configuration in 3D. read less
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