Lewis Structures of Atoms
1. Identify the Number of Valence Electrons and Draw the Lewis Dot Structure
Notes: Chemists use Lewis Dot Structures to show the valence electrons of an element as dots.
Since bonding involves the valence shell electrons only, it is only necessary to illustrate those outer
electrons.
Element
Calcium
Carbon
Hydrogen
Helium
Oxygen
Fluorine
Neon
Sodium
Aluminum
Bohr Diagram
Group
Number (PT)
# of Valence
Electrons
Lewis Dot Structure
2. Describe the relationship between Periodic Table Group and Valence Electrons
How many valence electrons do the elements in each Group have?
Group 1:
________
Group 2:
________
Group 13:
________
Group 14:
________
Group 15:
________
Group 16:
________
Group 17:
________
Group 18: Most of these elements have ________ valence electrons, but one
element, _______, only has __________ valence electrons..