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Why Two electron shells in oxygen?
Oxygen has two electron shells because it has eight electrons. The first shell can hold a maximum of two electrons, while the second shell can hold up to eight electrons. In oxygen, two electrons occupy the first shell and the remaining six electrons occupy the second shell to satisfy the octet rule.
Does Helium have 2 electrons in the first shell and 4 in the second?
No, Helium has 2 electrons in total, both of which occupy the first electron shell. The first electron shell can hold a maximum of 2 electrons, so Helium's electron configuration is 2.
Two electrons in helium are placed in only one shell while three electrons in lithium occupy two shells?
It is because the two electrons in helium are placed in K-shell. The K-shell has the capacity of only two electrons. Therefore, in Lithium the third electron is placed in the L-shell. You can find the capacity of a shell to hold electrons by the formula 2n2 where n is the shell no.
What is the maxium amount of electrons in a electron valence ring?
The maximum number of electrons that can occupy a valence shell, or electron valence ring, is eight, according to the octet rule. This rule states that atoms are most stable when they have eight electrons in their outermost shell. However, the first electron shell can hold a maximum of only two electrons.
What is the maximum number of electrons in the first shell?
2 electrons are found in the first electron shell.
How many electrons shells does a helium atom have?
The electron configuration of helium is 1s2; two electrons on the first (and the single) electron shell.
If an element is chemically active what is the state of its outer electron shell?
The key to "happiness" for an atom is a full outer electron shell. (The outer electron shell is called the valence shell.) There are two conditions that cause a shell not to be full. Either it has only an electron or two (or three) in the outer electron shell or it's short an electron or two in that outer shell. The direct answer to the question is that if an element is chemically active, its outer electron shell is incomplete or is not full.
How many shell do 2 electrons need?
Only one. The first shell can have up to 2 electrons.
What is the number of electrons that can occupy the first shell of an atom?
The first shell of an atom can hold a maximum of 2 electrons.
Hydrogen has a total of two electrons shells.?
No, hydrogen has a total of one electron shell because it only has one electron.
How many electrons fill the outer shell of helium?
There is only one electron inhabiting hydrogen and the compound therefore only has one shell, effectively making that shell the outer shell. TL;DR There is 1 electron in the outer shell of hydrogen.
What is the Valence electron in He?
helium has only one shell with two electrons and can be considered to be as the valence electrons.
