Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions


Magnesium comes after sodium in the same period. Atoms of both elements have three electron shells. But the nuclear charge of sodium is +11 and that of magnesium is +12. Hence, the electron shells are pulled inward more strongly Mg atom than in Na atom. Hence, sodium atom is greater than magnesium atom.

Hope this helps:)
2 4 2
Because sodium has only 1 valence electrons as compared to 2 of magnesium
0 0 0
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts