Presentation on theme: "Ionic Compounds An ionic bond holds positive ion(s) and negative ion(s) together to form compounds [http://www.agen.ufl.edu/~chyn/age2062/lect/lect_02/2_11a.gif]"— Presentation transcript:
Ionic Compounds An ionic bond holds positive ion(s) and negative ion(s) together to form compounds [http://www.agen.ufl.edu/~chyn/age2062/lect/lect_02/2_11a.gif] Click Here for an Ionic Bond Animation
Ionic Compounds Most are compounds that contain a metal and a non-metal. Ex: NaCl
Ionic Compounds Most form crystal structures. Can be very brittle and will break or shatter on contact. [http://liftoff.msfc.nasa.gov/academy/materials/topaz.gif]
Ionic Compounds Most have high melting points. (Very Strong Bonds!) Most will dissolve easily in water Will conduct electricity when liquid or dissolved in H 2 O
Ionic Compound Formulas Chemical Formulas show how many atoms of a particular element are present in a compound Example: Al 2 O 3 2 Aluminum atoms & 3 Oxygen atoms
Ionic Compound Formulas Ionic formulas are determined by the positive and negative charges of the atoms.
Ionic Compound Formulas Example: Magnesium Chloride Mg +2 and Cl -1 You need 2 Cl -1 to neutralize the Mg +2 MgCl 2 [http://www.southwest.com.au/~jfuller/chemistry/magnesiumchloride.gif]
Ionic Compound Formulas Use the “Criss-Cross” method to write formulas Ex: Sodium Sulfide Na +1 S -2 NaS 2
Ionic Compound Formulas Ex: Magnesium Oxide Mg +2 and O -2 “Criss-Cross” gets Mg 2 O 2 But only 1 atom of each is needed to neutralize so MgO is correct!
Ionic Compound Names 1 st - Write the name of the metallic element. 2 nd – Then write the name of the non-metallic element with the suffix –ide.
Ionic Compound Names Example: MgBr 2 Magnesium Bromide Example: Al 2 O 3 Aluminum Oxide
Transition Metal Ions Transition metals do not have an ion pattern and can have more than one type of charge. [http://wps.prenhall.com/wps/media/objects/602/616516/Media_Assets/Chapter02/Text_Images/FG02_12.JPG]
Transition Metal Ions Example: FeO What is the charge of Fe? We know O -2 … Fe must be +2 to neutralize the –2 of Oxygen... Iron (II) Oxide
Transition Metal Ions Example: Cu 2 O Copper (I) Oxide
Polyatomic Ions Ions that are made of multiple atoms. Example: OH - is the hydroxide ion. Pg. 232
Polyatomic Ions When naming, use the exact name of the ion. Example: NaNO 3 This is sodium nitrate.