Presentation on theme: "Do Now Label the following as element or compound: Mg O 2 H 2 SO 4 FI Find the number of atoms in the following elements/compounds: Mg O 2."— Presentation transcript:
Do Now Label the following as element or compound: Mg O 2 H 2 SO 4 FI Find the number of atoms in the following elements/compounds: Mg O 2 H 2 SO 4 FI
The Octet Rule Key Point #1: The octet rule says that atoms are most stable (happy) when they have 8 valence electrons
The Octet Rule - Review We’ve talked about ions before – how atoms will gain or lose electrons in order to get eight valence electrons An atom that has gained an electron has a negative charge An atom that has lost an electron has a positive charge
Key Point #2: Copy the chart on the board This chart is an easy reference to see what type of ion an element will form
But why? Key Point #3: For atoms in groups 1, 2 and 13, it is easier to lose electrons. For atoms in groups 14, 15, 16, and 17, it is easier to gain electrons.
Why do I need to review this information on ions? So we can predict how atoms will bond together. Watch this…
Just in time for Halloween! There is a TRICK to figure out what the ionic compound between a metal and a nonmetal will be.