ELECTRONS AVAILABLE FOR BONDING
Students know how to use the periodic table to determine the number of electrons available for bonding.
Students know how to draw Lewis dot structures.
Valence electrons are electrons in the outmost shell (energy level). They are the electrons available for bonding.
Group 1 (alkali metals) have 1 valence electron
Group 2 (alkaline earth metals) have 2 valence electrons
Group 13 elements have 3 valence electrons
Group 14 elements have 4 valence electrons
Group 15 elements have 5 valence electrons
Group 16 elements have 6 valence electrons
Group 17 (halogens) have 7 valence electrons
Group 18 (Noble gases) have 8 valence electrons, except helium, which has only 2
Transition metals (d block) have 1 or 2 valence electrons
Lanthanides and actinides
(f block) have 1 or 2 valence electrons
An atoms valence electrons can be represented by Lewis dot notations.
Dot Notations Period 2
Lewis dot notations for the valence electrons of the elements of Period 2.