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Consider these two electron configurations for neutral atoms L and M.

L-1s²2s²2p^6 3s²
M-1s²2s²2p^6 3s¹3p¹
What is the atomic number of L?

1 Answer

6 votes

Calculate electrons

  • 1s²2s²2p⁶3s²
  • [Ne]3s²

Total electrons=10+2=12

The element is Magnesium with symbol Mg as atomic no is 12

Additional:-

M:-

  • 1s²2s²2p⁶3s¹3p¹

Excited state of magnesium

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