Unit 2 lesson 4
chemical change
the starting materials completely lose their properties to form new substances
electrolysis
The process of passing electricity through water to chemically separate it into hydrogen and oxygen is called what?
molecule
The smallest unit of a compound
True
The various components of a mixture do not combine chemically.(T/F)
True
Unknown compounds can usually be identified based solely on their physical properties. (T/F)
phase change
a change from one state of matter to another
physical change
a change in shape, size, or physical characteristics but remaining same substance
Law of Constant Composition
a pure compound consists of exactly the same elements in the exact same ratios by mass
True
Iron filings can be separated from a mixture with sulfur by using a magnet. (T/F)
