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Naming…

Naming…. In case you don’t get it yet. BONDS:. Metal + nonmetal = ionic bond Metal + metal = metallic bond Nonmetal + nonmetal = covalent bond. Name to Formula. For Ionic Substances: Identify the cation (first thing) in the name.

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Naming…

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  1. Naming… In case you don’t get it yet

  2. BONDS: • Metal + nonmetal = ionic bond • Metal + metal = metallic bond • Nonmetal + nonmetal = covalent bond

  3. Name to Formula • For Ionic Substances: • Identify the cation (first thing) in the name. • A metal without parentheses after it means you use the periodic table to determine its oxidation number • A metal with parentheses after it means that the number in parentheses IS the oxidation number

  4. Name to Formula • For Ionic Substances: • Identify the anion (last thing) in the name. • Anything ending in “-ide” (except hydroxide or cyanide) is an element. Use the periodic table to determine the oxidation number • Anything ending in “-ite” or “-ate” is a polyatomic ion. Use the back of the periodic table to determine the oxidation number (written as an exponent)

  5. Name to Formula • For Ionic Substances: • Find the least common multiple of the oxidation numbers • Divide the LCM by the oxidation number of the cation – this will become the subscript for the first symbol (unless it is 1, then you don’t write the 1).

  6. Name to Formula • For Ionic Substances: • Divide the LCM by the oxidation number of the anion – this will become the subscript for the second symbol or ion (unless it is 1, then you don’t write the 1). • IF the anion is a polyatomic ion AND the LCM divided by the oxidation number of the anion is greater than one, put parentheses around the ion exactly as it appears on the back of the periodic table (without the charge) and the subscript for how many (LCM divided by oxidation number) outside the parentheses.

  7. Name to Formula • For Covalent Substances: • Identify the first element, write the symbol, and use its prefix value as its subscript • Identify the second element, write the symbol, and use its prefix value as its subscript

  8. Formula to Name • For Ionic Substances: • Identify the cation • If from group 1, group 2, or aluminum, just write the element name • If any other metal, determine the oxidation number of the anion (see above) and multiply it by the subscript of the anion. Divide this number by the subscript for the cation, make it positive, and that is the oxidation number for the metal. Write the name of the metal followed by the oxidation number as a Roman Numeral in parentheses after it.

  9. Formula to Name • For Ionic Substances: • Identify the anion • If a polyatomic ion, just write the name of the ion • If an element, change the end of the name to “-ide”

  10. Formula to Name • For Covalent Substances: • Write the prefix for the subscript of the cation followed immediately by the name of the first element. • Write the prefix for the subscript of the anion, followed immediately by the name of the second element, but change the ending to “-ide”

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