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.

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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 1 year ago

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