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Oxygen needs 2 electrons to fill it's valence shell which is why it forms a 2- ion.

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15y ago

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Does oxygen have an excess or a deficiency of electrons?

Oxygen tends to gain two electrons to fill its outer shell, resulting in a deficiency of electrons.


How many electrons does oxygen need to fill its outer shell?

Oxygen needs 2 electrons to fill its outer shell, which is the second electron shell. This shell can hold a maximum of 8 electrons. Oxygen has 6 electrons in its neutral state, so it will gain 2 electrons to achieve a stable electron configuration similar to a noble gas.


What is the number of electrons to fill outer shell of sulfur?

Sulfur has 6 electrons in its outer shell. Therefore, it needs 2 more electrons to fill its outer shell.


Why does oxygen have two shells?

Oxygen has two electron shells because it has eight electrons in total, with two in the first shell and six in the second shell. Atoms tend to fill their outermost electron shell to achieve stability, and oxygen does this by sharing electrons with other atoms or gaining electrons to fill its outer shell.


How many number of electrons to fill the outer shell of carbon?

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


An oxygen atom has 6 electrons in its outer shell how many electrons does it need to fill that shell?

They all have 6 in its outer shell because they are all in the same group in the periodic table. Your VERY VERY welcome (:


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.


How many electrons does nitrogen need to fill its outer shell?

Nitrogen needs 3 more electrons to fill its outer shell. It has 5 electrons in its outer shell, and it typically needs a total of 8 electrons to achieve a full outer shell (octet rule).


How many electrons are needed to fill up carbons outer shell?

Carbon needs 4 electrons to fill up its outer shell. It has 4 valence electrons and can achieve a full octet by gaining 4 more electrons.


How many electrons does nitrogen require to fill its outer shell?

Its atomic number is 7, and so it needs a further 3 electrons to fill its outer shell.


How many valence electrons will beryllium gain or lose to fill its outer shell?

Beryllium will lose 2 electrons to satisfy the octet rule (to fill its outer shell).


How many electrons would be needed to fill its outer shell for carbon?

4 to fill the 2p shell

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