What is the neutral atom that has its first two energy levels filled, has 2 electrons...

What is the neutral atom that has its first two energy levels filled, has 2 electrons in its third energy level, and has no other electrons? Enter the name of the element, not the abbreviation.

Expert Solution

First two energy levels filled means the electronic configuration is 1s² 2s² 2p⁶

and it has two electrons in it's third energy level means 3s²

So the total electron configuration is 1s² 2s² 2p⁶ 3s²

Total number of electrons = 12 and the atomic number is 12.

The element with atomic number 12 is Magnesium. The symbol for magnesium is Mg.

queen_honey_blossom answered 2 years ago

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