Chemical and Physical Changes
Unexpected temperature, color, or fizzing change
What are the characteristics of a chemical change?
Pure substance
What is an element?
charge of an atom changes to become stable
What is an ion?
Boiling water
What is an example of a physical change?
Fe2
What is an example of an element/diatomic molecule?
Valence electrons are shared to become stable
What is a covalent bond?
Changing an object so it is the same, in a different form
What is a physical change?
Two types of atoms chemically joined
What is a compound?
Valence electrons are transferred to become stable
What is an ionic bond?
Dissolving sugar
What is an example of a physical change?
Every sample slightly different
What is a heterogeneous mixture?
K3P (Potassium phosphide)
What is an example of an ionic bond?
Gasoline dries
What is an example of a chemical change?
Every sample identical
What is a homogenous mixture?
BrH
What is an example of a covalent bond?