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a pure substance containing only one kind of atom
Element
Two or more elements or compounds NOT chemically combined.
A mixture
the atoms are chemically combined in a definite proportion by mass.
Compounds
cannot be divided further into simpler substances
elements
A pure substance containing two or more kinds of atoms or elements.
Compounds
These mixtures can be uniform and are known as solutions. What are these?
Homogeneous Mixtures
Name 2 Homogeneous Mixtures
Milk, Salt Water
A Compound is always _________________ ( uniform, non uniform). Name it
Uniform, Homogeneous
They cannot be separated by physical means. Separating them requires a chemical reaction
Compounds
The Entire periodic table is made of ___________________ (what kind of substances?)
Elements
Mixtures can also be non-uniform. What are such mixtures called? Give 2 examples
Heterogeneous. Oil and water, Muddy Water
the properties of a ______________ are usually entirely different than the properties of their constituents. Explain
Compounds. Water is entirely different from Hydrogen and Oxygen
