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It depends, most atoms need 8 total valence electrons in their outer shell (some need 2). So subtract the number they have (determined by the group that the element is in) from 8 and that is how many they need to fill their outer shell!

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12y ago
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14y ago

Eight valence electrons completes a full outer shell.

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Q: How many valence electrons are needed to achieve a full outer shell?
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Related questions

The elements within a group have a similar number of?

Elements in the same group have the same number of valence electrons. These are the outer-shell electrons that react with other elements.


Is valence electrons in the outer most orbital?

No. Valence electrons are the electrons in the outer most orbit (or energy level) and not in outer most orbital.


How many electrons are needed to fill carbon outer shell?

Carbon has four valence electrons, so it will need four more electrons to fill its outer shell.


Outer shell electrons are known as hybrid valence vector or transitional electrons?

outer shell electrons are knows as Valence Electrons


What are valence elecdtrons?

valence electrons are the electrons on the outer-most shell of electrons


What are the electrons in the outer shell of an atom called?

valence electrons


How do you find the valence electron?

If you can find a dot diagram, look at the outer shell and count the electrons. The outer electrons is the amount of valence electrons.


How many electrons does silicon have in its outer shell?

4V V-Valence Electrons Valence Electrons-Last electron (which is on the outer shell)


Electrons in the outer shell are?

The valence electrons


What electrons are the outer most?

Valence electrons.


How with 5 valence electrons will achieve a full set of valence electrons?

If you're asking how will an atom with 5 valence electrons will achieve a full set of valence electrons, then the answer would be that they bond with other atoms to gain a full set of the valence electrons by sharing or gaining 3 electrons.


Outer shell electrons is known as?

The outer shell is called the valence shell