The atomic number of magnesium is 12. It means the number of protons and the number of electrons in a magnesium atom is 12. This leads to the electronic configuration of the magnesium as K=2, L=8. Magnesium ion Mg+2 CID 888 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety. The number of electrons in each of Magnesium's shells is 2, 8, 2 and its electron configuration is Ne 3s 2. The magnesium atom has a radius of 160 pm and a Van der Waals radius of 173 pm. Magnesium was discovered by Joseph Black in 1775 and first isolated by Sir Humphrey Davy in 1808.
Magnesium has 12 protons. How many electrons are in its first energy level?
1 Answer
Explanation:
This is a great example of how a problem can provide you with information you don't actually need in order to provide an answer.
Google browser download for windows 7. In this case, all you really have to know here is that the atom in question is not hydrogen.
With the exception of hydrogen, every other atom in the periodic table will have two electrons in its first energy level.
Hydrogen, on the other hand, will only have one electron in its first energy level, and that's simply because it only has one electron in total.
Electrons In Magnesium Diagram
So the answer to this question is
The electron configuration of magnesium
Valence Electrons In Magnesium
Now, the first energy level can only hold a maximum of two electrons because it only contains one orbital, the 1s-orbital.
Spotify for macbook pro. So when asked about how many electrons can be found in an atom's first energy level, think
#color(blue)('1 electron') -># if the atom is hydrogen#color(green)('2 electrons') -># if the atom is not hydrogen
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