Molecules, Compounds, & Mixtures
a group of atoms 2 or more
What is molecules?
when any kind of this is formed, a physical change takes place
What is a mixture?
a substance that is made from molecules 2 or more than one element a pure substance
What is a compound?
scientists use symbols in these that describe molecules
What are formulas?
different types of these are produced when an acid or a base breaks up in water
What is an ion?
Element may contain _____________ and ___________ making it a pure substance
atoms and molecules
Formulas must be balanced or unbalanced
What is balanced?
What is the number assigned to bases?
What is 8-14
every molecule in a compound is like this
What is exactly the same?
when baking a cake, the mixture does this to create atoms of a new substance
What is a chemical change
there are the ____________ number of each kind of atom on each side of the equation
What is same?
What are the numbers assigned to an acid?
What is 0-6
most of the things you see in everyday life are not pure elements or compounds, they are these
What are mixtures?
chemical changes turn the food you eat into this your body can use uses this an acid or base
What is an acid?
What is the scale used to measure an acid or base?
What is the pH scale?