Presentation is loading. Please wait.

Presentation is loading. Please wait.

Periodic Trends in Period 3

Similar presentations

Presentation on theme: "Periodic Trends in Period 3"— Presentation transcript:

1 Periodic Trends in Period 3
Chlorides and Oxides Bonding and Structure

2 Position of elements on the periodic table affects the type of bonding.

3 Period 3: Chlorides NaCl, MgCl2, AlCl3, SiCl4, PCl5
increase in the number of electrons available to form bonds. increasing valence e-

4 Chlorides of Metals (NaCl, MgCl2)
ionic high melting points soluble in water do not react with water electrolytes (conduct electricity) as aqueous solutions or molten (liquid) NaCl(aq)  Na+(aq) + Cl-(aq)

5 Electrolyte

6 Chlorides of Non-Metals (PCl5, PCl3)
molecular/covalent weak van der Waal’s forces between molecules = low melting and boiling points hydrolysis: to split by the action of water PCl3(l) + 3H2O(l)  P(OH)3(aq) + 3H+(aq) + 3Cl-(aq) non-metal/Cl bond replaced by a non-metal/O bond

7 non-metal chlorides (aq) conduct electricity (but not when molten)
Cl2: molecular/covalent, reacts with water in a hydrolysis reaction Cl2(g) + H2O(l)  HOCl(aq) + HCl(aq) Al: metal, but acts like a non-metal in bonds because of it’s high charge, small size ion

8 Period 3 Oxides reducers oxidizers (donate e-) (accept e-)
Na2O, MgO, Al2O3, SiO2, P4O10, SO3, Cl2O7 P4O6 SO2 Cl2O basic acidic reducers oxidizers (donate e-) (accept e-)

9 Metals: Na, Mg ionic solids basic
react with water to make alkaline solution Na2O(s) + H2O(l)  2Na+(aq) + 2OH-(aq)

10 Metalloids: Al “giant covalent lattices” high melting/boiling points
insoluble in water Al2O3 is amphoteric (dissolves in acid or base) Al2O3(s) + 6H+(aq)  2Al3+(aq) + 3H2O(l) Al2O3(s) + 2OH-(aq)  3H2O(l) + 2Al(OH)4(aq)

11 Non-metals: Si, P, S, Cl molecular/covalent bonding
gases, liquids, solids with low melting points non-metal oxides react with water to produce acids P4O10(s) + 6H2O(l)  4H2PO4-(aq) + 4H+(aq)

12 Element Na Mg Al Si P S Cl Bonding Metallic  Giant Covalent Lattice Molecular/ Covalent Chloride Formula NaCl MgCl2 AlCl3 SiCl4 PCl5/PCl3 Cl2 Ionic Molecular/covalent Oxide Na2O MgO Al2O3 SiO2 P4O10 SO3 Cl2O7 P4O6 SO2 Cl2O Giant Covalent Molecular/Covalent Acid/Base Soluble Insoluble Amphoteric acidic Properties basic

Download ppt "Periodic Trends in Period 3"

Similar presentations

Ads by Google