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1st energy level- 2 electrons

2nd energy level- 8 electrons

3rd energy level- 18 electrons

To calculate the number of electrons other energy levels can hold, use the formula 2n^2. For example, to calculate the number of electrons the fourth level can hold, the equation would be 2(4)^2. This means that the fourth energy can hold 32 electrons. Same process for other levels.

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14y ago
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13y ago

8 is the full complement of outer electrons

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15y ago

depends on the atom

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11y ago

8

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13y ago

4

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Q: How many electrons does it neeed to gain to have a full outer shell?
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Related questions

Argon is a stable gas with a very high ionization energy Which statement explains why?

It has a full outer shell of electrons


How many more valence electrons does magnesium need to have a full outer valence shell?

it needs six more electrons to have a full outer valence shell.


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Is the outer shell of argon full?

Yes it is . The outer argon is full becoz it has 18 electrons


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no its outside shell has 10/18 electrons


How many valence electrons will most elements have after forming an ion?

Atoms often form ions by losing or gaining enough electrons to end up with a full outer shell. How many electrons are in a full outer shell for most atoms? Don't know? How about Googling full outer shell?


Why do noble gases not normally form compounds?

Noble gases have a full outer shell, meaning that they have no valence electrons and have 8 electrons in their outer shell. If the outer shell is full they do not need electrons, so they would not want to bond with another element to form a compound.


How many valance electrons in neon?

Eight - it has a full outer shell of electrons.


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Why is chlorine diatomic?

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Each atom is left with a what outer shell?

Electron outer shell tee hee =^-^=