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Introduction to naming Chemical Compounds. So Far We’ve Learned:. Compound are made from ions Formulas start with the cation and end with the anion renamed with “ide” Subscripts determine the number of atoms Polyatomic ions are ions made of many atoms and usually have parenthesis around them.
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So Far We’ve Learned: • Compound are made from ions • Formulas start with the cation and end with the anion renamed with “ide” • Subscripts determine the number of atoms • Polyatomic ions are ions made of many atoms and usually have parenthesis around them
How are compound named? (Type I & II) • all metals (cations) use the name from the periodic table • all non metal ions (anions) use the name from the periodic table changed to “ide” • polyatomics don’t change their name • transition metals require roman numerals that match thier charge eg. Fe+2 is Iron (II), Fe+3 is Iron (III)
If the positive ion is a transition metal, the name of the compound MUST include a Roman Numeral! Transition Metals Here’s an example: There are two “iron chlorides”: FeCl2 is iron (II) chloride FeCl3 is iron (III) chloride The Roman Numeral indicates the charge of the metal ion
Type III • Non metal and non metal (NO IONS) • Use prefixes to tell the number of atoms (see chart) • No polyatomics
Acids • Always begin with Hydrogen • Use a list to name them