There are different numbers of valence electrons in different elements.
The are the valence electrons.
Hydrogen is an atom that does not need 8 electrons in its outer energy level to be stable. Hydrogen only needs 2 electrons to fill its outer energy level.
Valence electrons
The outer energy level refers to the highest energy level of an atom that contains electrons. These electrons are involved in chemical reactions and bonding with other atoms. The number of electrons in the outer energy level determines an atom's reactivity and ability to form chemical bonds.
the largest number of electrons an atom of helium can have is 2, because it is in the first period, which means it can only have one energy level, which has a maximum capacity of two electrons
In a neutral carbon atom, there will be 4 electrons in the outer most valence shell.
The atom with five electrons in its outer level and ten electrons in its kernel is boron. Boron has an atomic number of 5, with two electrons in the first energy level and three electrons in the second energy level.
chg
No atom can hold 18 electrons in its outer energy shell - there is the valence rule, stating that the maximum for the outer shell is 8 electrons.
the outer energy level electrons.
Valence electrons.
There are 3 electrons in the outer energy level of a neutral boron atom. Boron has 5 electrons in total, with 2 in the first energy level and 3 in the second energy level, which is the outermost energy level.