This value could vary from element to element and atoms could have 1 to 8 valence electrons.
Except for hydrogen,Helium,Lithium,Beryllium and Boron, every element requires 8 electrons to fill its outermost shell.
8 valance electrons
8 electrons
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Carbon has four electrons in the outermost energy level, which is energy level two. It needs eight electrons to have this energy level filled.
8
Calcium atoms have two electrons in the s orbital of their outermost energy level. Their electron configuration is [Ar]4s2.
The electrons on the outermost energy level of the atom are called valence electrons.
There are eight electrons in the outermost energy level of a chloride ion.
Atoms can fill their outermost energy level by either gaining electrons from other atoms or by sharing the outermost electrons with another atom.
They can either gain, share, or lose electrons to have a full energy level
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valence electrons are the electrons in the outermost energy level
Carbon has four electrons in the outermost energy level, which is energy level two. It needs eight electrons to have this energy level filled.
Halogens have six valence electrons in the outermost energy level.
they need to either gain or lose electrons to create an octet. It depends on the atom. an octet is when an atom has a full outermost energy level
Calcium atoms have 8 electrons in the second energy level. However, they are not the valence electrons. The outermost electrons in a calcium atom in the ground state are 2 4s electrons. So calcium atoms in the ground state have 2 valence electrons in the fourth energy level.
The chloride ion (Cl-) has 8 electrons on the outermost energy level.
2. the number of electrons on the outermost level is always equal to the group number. Barium is group 2 therefore it's outermost energy level contains 2 electrons
The most stable atoms/ions have 8 electrons in their outermost shell.