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BELL RINGER. What would be the formula for a BINARY IONIC COMPOUND formed from each pair of elements? Refer to the COMMON ION Periodic Table for charges. Calcium and Fluorine 2. Aluminum and Sulfur 1 ( +2) 2 (-1) 2 (+3) 3 (-2)
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BELL RINGER • What would be the formula for a BINARY IONIC COMPOUND formed from each pair of elements? Refer to the COMMON ION Periodic Table for charges. • Calcium and Fluorine 2. Aluminum and Sulfur 1 ( +2) 2 (-1) 2(+3) 3(-2) Ca F Al S CaF2 Al2S3 What should we call these compounds?
Binary Ionic Compounds • I CAN name a binary ionic compound from its properly written formula.
What are BINARY Ionic Compounds? • The formulas we’ve written to this point represent BINARY IONIC compounds: • Consist of only TWO DIFFERENT ELEMENTS. • Contain a + METAL CATION and a – NONMETAL ANION.
Naming a Binary Ionic Compound • To name a binary ionic compound: • 1. Name the + METAL ION first by its ELEMENT NAME. • 2. Name the – NON-METAL ION last by its ELEMENT NAME except: • Change the ENDING to “IDE”. • If the name ends in “INE” just switch to “IDE”. • If the name ends in something else, you may have to DROP PART OF THE NAME before changing to IDE.
EXAMPLES CHLORIDE • Chlorine – ends in “INE” – becomes • What does Bromine become? • What about elements that do not end in INE? • Oxygen becomes • Sulfur becomes • Phosphorus becomes • Nitrogen becomes • Arsenic becomes BROMIDE OXIDE SULFIDE PHOSPHIDE NITRIDE ARSENIDE
Practice Problems • Name these compounds: • NaCl • CaF2 • Ba3P2 • K3N • AlAs • SODIUMCHLORIDE • CALCIUM FLUORIDE • BARIUM PHOSPHIDE • POTASSIUM NITRIDE • ALUMINUM ARSENIDE
More Practice Problems • Determine the FORMULA for the binary ionic compound formed by each pair of atoms, then NAME the compound. • 1. Rubidium and Fluorine 6. Francium and Oxygen • 2. Potassium and Phosphorus 7. Calcium and Bromine • 3. Radium and Nitrogen 8. Strontium and Arsenic • 4. Lithium and Sulfur 9. Aluminum and Selenium • 5. Boron and Fluorine 10. Rubidium and Astatine
1. RbF Rubidium Fluoride • 2. K3P Potassium Phosphide • 3. Ra3N2 Radium Nitride • 4. Li2S Lithium Sulfide • 5. BF3 Boron Fluoride • 6. Fr2O Francium Oxide • 7. CaBr2 Calcium Bromide • 8. Sr3As2 Strontium Arsenide • 9. Al2Se3 Aluminum Selenide • 10. RbAt Rubidium Astatide