LT#7: Naming and Writing Chemical Formulas Flashcards
How do you recognize an ionic compound from its name or formula?
Contains a metal and non-metal, metal and poly or poly and non-metal
How do you recognize a molecular compound from its name or formula?
Contains only non-metals
What are the steps to writing an ionic formula?
Step 1: Find the charge on each element or polyatomic (groups of non-metals with an overall charge).
Step 2: Cross over charge #’s to quantity #’s. Use brackets to designate more than one polyatomic - they are usually treated as a single unit because they move as a group.
Step 3: Reduce if possible
What are the steps to writing a molecular formula?
Step 1: Write down each element’s symbol
Step 2: Use the prefixes to determine the subscript numbers
DO NOT reduce molecular compounds.
What are the steps to writing the name of an ionic compound?
Step 1: Give the metal its full name.
Step 2: Add a Roman numeral for metals that have more than one charge.
Step 3: If ending is
a) A non-metal: Name non-metal and change the ending to ‘ide’
b) A polyatomic: Leave as polyatomic name (don’t change).
What are the steps to writing the name of a molecular compound?
Step 1: Give the first atom its full name. Use a prefix on element name to indicate the # of atoms it contains.
Step 2: Give the second atom its full name. Use a prefix on element name to indicate the # of atoms it contains.
Step 3: Change the ending to “ide”
What is the formula for sodium bromide?
NaBr
What is the formula for magnesium iodide?
MgI2
What is the formula for diphosphorous monosulfide
?
P2S
What is the formula for dinitrogen tetroxide?
N2O4
What is the formula for cobalt(III) nitrate?
Co(NO3)3
What is the name of KCl?
Potassium chloride
What is the name of ZnF2?
Zinc flouride
What is the name of Pb(OH)2?
Lead (II) hydroxide
What is the name of P2O3?
diphosphourous trioxide
