Naming Ionic Compounds. Warm Up – Putting it together. What is a compound? Draw a Bohr-Rutherford diagram of a Hydrogen and Oxygen atom How do you think the compound H 2 O is formed? . Learning Goals. By the end of class, I will be able to : Understand how ionic compounds are formed
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What is a compound?
Draw a Bohr-Rutherford diagram of a Hydrogen and Oxygen atom
How do you think the compound H2O is formed?
Notice BOTH ions have EIGHT valence electrons! (outermost shell electrons)
NamingUnivalent Ionic Compounds
All ion charges in an ionic compound MUST add up to ZERO – the compound itself has no net charge
~ The positive and negative charges of an ionic compound must be equal ~
How do you determine if the chemical formula includes a subscript?
The positive and negative charges in an ionic compound MUST equal.
Steps for Writing Formulas for Ionic Compounds
1 to 2
1. Ionic Compounds – Names and Formulas Worksheet
2. Textbook questions in Weekly Outline
Step 1: Write the symbols of each element (remember to write the symbol for the metal first)
Step 2: Write the ion charge above each corresponding symbol. Remember that the ion charge is based on the number of electrons gained (negative) OR lost (positive) to become an ion.
Step 3: Crisscross the ion charges, erase the signs of each ion charge, and write them as subscripts
Note: If you need the same number of each ion, you can reduce the formula to one of each ion, as shown here.