Editing Naming Binary Ionic Compounds
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<center><b>Chemistry - Naming Binary Ionic Compounds</b></center><br> <br> <b>A. Chemical Name to Chemical Formula</b><br> 1. Write down the symbol and charge of cation, then the anion. <br> 2a. The total positive charge has to equal the total negative charge. <br> 2b. Determine the number of each ion to make the charges equal. <br> 3. To get correct chemical formula<br> **Each number of positive/negative ions will be the subscript of the ion in the final chemical formula. **When writing chemical formula, never shows charges of ions, just their element symbol.<br> <i>Example: Calcium bromide</i><br> Step 1 Ca<sup>2+</sup> Br<sup>1-</sup><br> Step 2 Need one cation, Ca<sup>2+</sup>,and two anion, Br<sup>1-</sup>,Br<sup>1-</sup><br> Step 3 Ca<sub>1</sub>Br<sub>2</sub><br> <i>More Examples:</i> Magnesium sulfide, Aluminum nitride (Answer: Mg<sub>1</sub>S<sub>1</sub>, Al<sub>1</sub>N<sub>1</sub>)<br> <b>B. Chemical Formula to Chemical Name</b><br> <br> 1. Write down the chemical name for the cation (always first part). (it will be the first word, <b>1st letter is capitalized</b>).<br> 2. Write down the chemical name for the anion (always second part). (it will be second word, <b>Never Capitalized</b>). Remember for elements that are anions, simply drop ending and add "ide".<br> <i>Example</i>: Na<sub>2</sub>O<sub>1</sub><br> Step 1 Sodium <br> Step 2 Sodium oxide<br> <br> <i>More Example</i>: Sr<sub>1</sub>Se<sub>1</sub>, Li<sub>3</sub>P<sub>1</sub> (Answer: Strontium selenide, Lithium phosphide)<br>
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