6
The word "valance" is used to describe electrons in the outer-most energy level of an atom. Oxygen has six valance electrons.
The oxygen family, also known as Group 16 on the periodic table, has 6 valence electrons. This includes elements like oxygen, sulfur, selenium, and tellurium. Valence electrons are the electrons in the outermost energy level of an atom and are involved in bonding.
There are 5 valence electrons in the atom phosphorus.
6 valence electrons
2
6
3
Boron has three valance electrons. Boron also has three electtrons in outermost energy shell. The 'Valance' number of electrons tells you how many bonds will form between boron and other atoms. Compare with oxygen . Oxygen has two valance electrons . However, oxygen has 6 electrons in its outermost energy shell. This means that oxygen will form two bonds between other atoms. Thus leaving four electrons uncombined; they are known as 'lone pairs'.
4 valence electrons dude!
3 valence electrons
That neutral silicon atom has four electrons in its valence shell.
An iodine atom has seven valence electrons.