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Only one. The first shell can have up to 2 electrons.

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13y ago
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13y ago

One. Called the K shell.

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Q: How many shell do 2 electrons need?
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Related questions

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

10 electrons


How many electrons does an atom of oxygen need to complete its outer shell?

2


How many electrons are there in the L shell of neon?

2 electrons in the K shell and 8 electrons in the L shell


How many shell do 4 electrons need?

the first shell holds 2 and the second one holds 8 so you would need 2 shells!


How many electrons does He and Ca have in its outer shell?

Helium (He) has 2 electrons in its outer shell. Calcium (Ca) has 2 electrons in its inner shell and 8 electrons in its outer shell.


How many electrons do silicon atoms have?

14 electrons. 2 electrons in the first shell, 8 electrons in second shell, and 4 electrons in the valence shell.


How many electrons on the outermost shell of calcium?

There are 2 electrons on the outermost shell of calcium.


How many electrons go in the first shell of oxygen?

In the first shell there are two electrons and in the second shell there are six electrons, but only the electrons in the second (outer) shell are valence electrons.


How many valence electrons are needed to achieve a full outer shell?

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!


How many electrons can the K shell of an atom hold?

The K shell of an atom can hold up to 2 electrons.


What is the numbers of electrons in each shell?

According to one of Lewis' theories, each shell has a maximum number of electrons using the formula 2n2 where n = the shell number. For example: 1st shell = 2(1)2 = 2 electrons maximum; 2nd shell = 2(2)2 = 8 electrons maximum.


How many electrons in the outer shell of CH2O?

2 electrons