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Magnesium, an alkaline earth metal, has 2 valence electrons. The valence electrons of magnesium can be determined through its position on the periodic table or by using its electron configuration.
Methods
Using periodic table
Get the periodic table having the chemical elements marked on it as mentioned above.
Now mark the location of magnesium on the periodic table.
Next, mark the group number of magnesium on the periodic table.
The valence electrons of each main-group element can be determined by the column in which it is located.
(i.e., all group 1 elements have 1 valence electron, all group 2 elements have 2 valence electrons, skip the transition metals… then, all group 13 elements have 3 valence electrons, all group 14 elements have 4 valence electrons, and so on up to group 18 elements)
Since magnesium is in group 2, it has 2 valence electrons.
Using electron configuration
- First, write electron configuration of magnesium
The electron configuration of magnesium is [Ne] 3s2.
- Second, find highest energy level in electron configuration
In the above electron configuration, the highest energy level (3) is marked with green color.
- Finally, count electrons of that energy level
The 3rd energy level contains 3s subshell and it has 2 electrons. So magnesium has a total of 2 valence electrons.
Next: Potassium valence electrons
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External links
- https://socratic.org/questions/how-many-valence-electrons-are-in-an-atom-of-magnesium
- https://www.sciencecoverage.com/2021/01/magnesium-valence-electrons.html
- https://www.quora.com/How-many-valence-electrons-are-in-magnesium
- https://homework.study.com/explanation/how-many-valence-electrons-does-magnesium-have.html
- https://valenceelectrons.com/valence-electrons-of-magnesium/
- https://www.numerade.com/questions/what-are-valence-electrons-how-many-of-a-magnesium-atoms-12-electrons-are-valence-electrons/
- https://brainly.com/question/6775078
Deep
Learnool.com was founded by Deep Rana, who is a mechanical engineer by profession and a blogger by passion. He has a good conceptual knowledge on different educational topics and he provides the same on this website. He loves to learn something new everyday and believes that the best utilization of free time is developing a new skill.