Chemical bonding .All chemical bonds:formed from a transfer ofelectrons between atoms. Valence electrons The electrons involyed in bonding Valence electrons in the incomplete,outermost orbital of an atom. C1:1s22s22p63s23p Na:1s22s22p3s Cu:1s22s22p63s23p3d4sChemical Bonding •All chemical bonds: formed from a transfer of electrons between atoms. •Valence electrons : The electrons involved in bonding •Valence electrons : in the 2 2 6 1 Na s s :1 2 2 p 3 s 2 6 2 2 5 C s s p l :1 2 2 3 3 s p 2 2 6 2 6 10 1 C s s p s p u :1 2 2 3 3 3 4 d s •Valence electrons : in the incomplete, outermost orbital of an atom