anonymous
  • anonymous
Explain why a magnesium atom is smaller than atoms of both sodium and calcium
Chemistry
  • Stacey Warren - Expert brainly.com
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jamiebookeater
  • jamiebookeater
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Rogue
  • Rogue
The Mg atom is smaller than Na as it has 1 more proton, which increases its effective nuclear charge. The nucleus exerts a greater force of attraction that brings the electrons closer inward, and so the atom is smaller. Mg is smaller than Ca because Ca has an extra electron shell. Also, the electrons in lower shells of Ca shields the valence electrons from the nuclear charge and so the atom can be bigger.
anonymous
  • anonymous
oh ok thanks that makes snese
Rogue
  • Rogue
No problem =)

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UnkleRhaukus
  • UnkleRhaukus
great answer

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