∨ alence electrons Valence electron Define: the outer shell electrons Important for determination of chemical properties Valence electrons AⅢAⅢ AA VA VIAⅦAWA Li·Be·B :N·:O::F::Ne In general the number of valence electrons of a representative element is equal to the group numberValence Electrons  Valence Electron  Define: the outer shell electrons  Important for determination of chemical properties 2