Chemistry Project Chapter 2
Atoms and Matter
Atoms are composed of a nucleus and electrons. While matter can be anywhere from 10-15 thousand atoms or molecules.
Substances and Mixtures
A mixture is two or more things that are not chemically combined and can be seperated by physical means. There are two types of mixtures, a homogeneous mixture and a heterogeneous mixture. A homogeneous mixture is one that is not visibly different, and a heterogeneous mixture is a mixture that the differences can be seen. On the other hand, A substance is a pure element. It has nothing with it.
Example of homogeneous mixture
Examples of Heterogeneous Mixtures
Examples of Substances
Elements and Compounds
An element is composed of just one atom and written with a symbol while a compound is composed of two or more elements and is written with a formula.