Showing posts with label 5 step cross over rule. Show all posts
Showing posts with label 5 step cross over rule. Show all posts

Sunday, February 1, 2009

3.01 - Writing Formulas for Binary Ionic Compounds - 20:51



KEY CONCEPT:

When you combine a metal and a non-metal, use the 5 Step Cross over Rule to put together your formula

Tuesday, January 27, 2009

3.04 - Polyatomic Ions - 14:06



KEY TERMS: 2 or more non-metals, Nick the Camel ate a Clam for Supper in Phoenix, "ate" ending

Underlined letter represents the atom
# of consonants = # of oxygens
# of vowels = # of negative charges associated with polyatomic
Ending is "ate" - except for ammonium ion and hydroxide ion

5 Step Cross over rule:
- Remember that polyatomic has brackets and the charge is written outside of the brackets
- remove brackets when the number outside of the brackets is a "1"javascript:void(0)

5.03 - Single DIsplacement Reactions - 18:52



KEY CONCEPTS:

metals switch with metals**
non-metals switch with non-metals

**look at the Activity Series if metal would switch with metal. If LONELY metal is higher in the Activity series than the metal paired with the non-metal can the metal switch places. If the LONELY metal is lower in the series, NO REACTION will take place.

Don't forget to balance equations! Don't forget the 5 Step Cross Over Rule