1. Use the periodic table to find the missing
information
Chlorine (Cl)
1.Number of protons
2.Number of electrons
3.Number of neutrons
4.Number of energy shells
5.Number of valence electron(s)
17
17
18
3
7
3. CompoundsCompounds
Matter made up ofMatter made up of
two or more elementstwo or more elements
chemically combinedchemically combined
The elements loseThe elements lose
their individualtheir individual
propertiesproperties
4. CompoundsCompounds
The new compoundsThe new compounds
formed have newformed have new
propertiesproperties
Ratio of their parts areRatio of their parts are
exactexact
NaCl, HNaCl, H22O, COO, CO22
6. Ionic BondIonic Bond
Strong attractiveStrong attractive
force between ions offorce between ions of
opposite chargesopposite charges
7. Ionic BondIonic Bond
Valence electrons can beValence electrons can be
transferredtransferred
From one atom to anotherFrom one atom to another
If an atom gains or losesIf an atom gains or loses
electrons, it becomeselectrons, it becomes
electrically chargedelectrically charged
IonIon
8.
9. Ionic BondIonic Bond
Ionic compounds areIonic compounds are
usually formed from ausually formed from a
metal and a nonmetalmetal and a nonmetal
12. Properties of Ionic CompoundsProperties of Ionic Compounds
Form strong 3-D crystalForm strong 3-D crystal
structuresstructures
Hard, rough, and brittleHard, rough, and brittle
Solid at room tempSolid at room temp
High melting pointsHigh melting points
13. Properties of Ionic CompoundsProperties of Ionic Compounds
Tend to dissolve inTend to dissolve in
waterwater
This solution conductsThis solution conducts
electricity very wellelectricity very well
