Close up view of atoms and their behavior Animated images are from http://www.chem.purdue.edu/gchelp/http://www.chem.purdue.edu/gchelp/
Changing from one state to another is a Physical Change. If a new substance is formed it is a Chemical Change. Images are from http://www.chem4kids.com
The building blocks of Matter Consists of Protons (+), Electrons (-), and Neutrons (N). Consists of only one kind of atom, Cannot be broken down into a simpler type of matter by either physical or chemical means Can exist as either atoms or molecules. Images are from http://www.chem4kids.com
A molecule consists of two or more atoms of the same element, or different elements, that are chemically bound together. In the animation above, two nitrogen atoms (N + N = N2) make one Nitrogen molecule.
Animated images and notes from http://www.chem.purdue.edu/gchelp/atoms/elements.htmlhttp://www.chem.purdue.edu/gchelp/atoms/elements.html Atoms of two or more different elements bound together. Can be separated into elements chemically, but not physically. In the animation above, water (H 2 0) is a compound made of Hydrogen and Oxygen.
Solutions are groups of molecules that are mixed up in a completely even distribution. Uniform Distribution. Example: Sugar and Water Images are from http://www.chem4kids.com
The substance to be dissolved. The one doing the dissolving. Images are from http://www.chem4kids.com
Particle sizes are in between the size of particles found in solutions and suspensions. Can be mixed and remain evenly distributed without settling out.
They are substances held together by physical forces, not chemical. Can be separated physically. Solutions are also mixtures. The substances are not uniformly mixed. Example: Sand in a glass of water. Images are from http://www.chem4kids.com
Are heterogeneous mixtures consisting of parts that are visible to the naked eye. Example: the ingredients in salad dressing Substances will settle over time.