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BONDS…
Valence electrons do the bonding- look at your chart
GOALS– To fill up the energy level
They can do that by giving away electrons Or by receiving electrons Or by sharing electrons
GROUP NAMES
Charge Trend
Align with
Charge trend
Alkali Metals +1
Alkaline Earth Metals
+2
Boron Family +3
Carbon family
+4/-4
GROUP NAME
Charge Trend
Align with
Charge trend
Alkali Metals +1 Halogens
Alkaline Earth Metals
+2 Oxygen fam
Boron Family +3 Nitrogen fam
Carbon family
+4/-4 Itself…
GROUP NAME
Charge Trend
Align with
Charge trend
Alkali Metals +1 Halogens
-1
Alkaline Earth Metals
+2 Oxygen family
-2
Boron Family +3 Nitrogen family
-3
Carbon family
+4/-4 Itself…
What about me?!!!• Tell me about the Noble Gases….• What is their charge trend?
• Tell me about the transition elements…
They don’t bond because they have a full energy level… They exist alone….
They don’t follow the rules, they are complicated…
Ionic Bonds
Giving/receiving But what is really holding them together???
Ionic compounds… properties
Form crystals Have high melting and boiling points Very hard and brittle Conduct electricity + charge : cation - charge : anion
Show these ionic bonds using electron dot diagrams, and a 3 step process….
NaCl (sodium chloride) Magnesium Oxide (MgO) , Sodium hydroxide (NaOH)
Covalent Bonds
Co-operation/ sharing …. A way to remember Share 2: single bond Share 4: double bond Share 6 : triple bond Held together this way? Molecule!
USE the Venn diagram system to show covalent bonds!!
Draw how these atoms bond covalently in a 3 step process…
Water (H2O) Methane (CH4) Hydrogen peroxide (H2O2)
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