Lewis Dots and Ions
Name: _______________________________
Per.: _____
Complete the table below. Aluminum is done as an example.
Solar System Model: Use the chemical symbol to represent the nucleus; draw all electrons in their correct shell.
Lewis Dot Notation: Write the chemical symbol, then place dots for the valence electrons around the symbol.
(Draw them on the sides of an imaginary box.) Remember: # valence electrons = group #
Rule of 8: Does the atom need to gain or lose electrons to gain a full (or empty) valence shell? How many
electrons?
Remember: metals are losers.
Ionic Charge: Determine the ionic charge of each ion. (“Ion” = a charged particle.) add a -1 charge for each
electron gained and a +1 charge for each electron lost.
Ion Notation: Write the chemical symbol, then the ionic charge as an exponent (above and to the right).
Aluminum (Al)
Bohr Model
Lewis Dot
Diagram
Al
Al
Group
Number
Rule of 8
(e- lost/gained)
Ionic
Charge
Ion
Notation
3A
loses 3 e-
+3
Al3+
Lithium
Nitrogen
Oxygen
Magnesium
Potassium
Iodine
Gallium
Neon
Selenium
Follow-up: What do you think will happen when Lithium and Oxygen ions come together? Be specific.