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Bell Work. Draw the electron dot structure for each of the following: MgF 2 C 2 H 4 O 2. Physical Science – Lecture 42. Naming Compounds. NAMING COMPOUNDS. Just like differing electron dot structures, covalent bonds have a different naming system than ionic bonding:. Ionic Compounds.
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Bell Work • Draw the electron dot structure for each of the following: • MgF2 • C2H4O2
Physical Science – Lecture 42 Naming Compounds
NAMING COMPOUNDS • Just like differing electron dot structures, covalent bonds have a different naming system than ionic bonding:
Ionic Compounds • Formed from a non-metal and a metal or a cation and an anion. • To create a compound, the charge of the cation and anion must cancel. • The numbers of each will be written as subscripts.
Special Considerations • When an ion is made of more than 1 capital letter and more than 1 of the ion is needed in a chemical formula, the entire ion must be put into parenthesis and the subscript is written outside the parenthesis.
Covalent Compounds • Formed from two non-metals. • Prefixes of mono, di, tri, and tetra are translated into numbers of each element.
When Covalently Bonded • When two or more of one element are part of a covalently bonding compound, a prefix is needed to determine how many of each is present since there are no charges for covalently bonded atoms.
Prefixes • Mono – one • Di – two • Tri – Three • Tetra – Four • Penta – Five • Deca - Ten
Proper Endings • When non-metals form compounds, the ending of their name changes to –ide when they are the last element in the compound. • Oxygen = oxide • Nitrogen = nitride • Chlorine = Chloride
Examples • “dioxide” – two oxygens • “trioxide” – three oxygens
Example • Carbon disulfide
Example • Nitrogen monoxide
Example • Dinitrogen oxide
Practice • Sodium Sulfate
Practice • Nitrogen monoxide
Practice • Lithium hydroxide
Practice • Potassium Phosphate
Practice • Calcium Phosphate
Practice • Aluminum Sulfate
Practice • Beryllium Oxide
Example • Sodium Oxide
Practice • Carbon Tetra-Chloride
Practice • Sulfur tri-oxide