Unit 1 Lesson 4 Flashcards
Atoms
The smallest unit of an element that maintain the properties of the element
The basic building blocks of matter
Element
Made up of one or more of the same kind of atom chemically combined
Example: Oxygen
Hydrogen
Compound
Made of of different types of atoms chemically combined
Example: H2O (water)
Mixture
Contains a variety of elements and compounds that are not chemically combined with each other
Pure Substance
A substance that has definite physical and chemical properties such as appearance, melting point, and reactivity . Include elements and compounds
A. Made up of 1type of particle
B. Physical changes do not change the identity
How Can Elements be Classified?
- By their pH
- As organic or inorganic (Organic means it contains carbon and hydrogen)
- By their role in the body
What are Mixtures?
- Made up of more than 1 type of particle (not pure)
- Can be separated by physical changes
Heterogeneous Mixture
Homogeneous Mixture
A mixture that does not have a even composition
A mixture where the substances are evenly spread throughout
Suspension
Solution
Colloid
A mixture where the particles are too large to stay mixed without being stirred or shaken
A mixture where one substance is dissolved in another substance
The particles are small and do not settle out quickly