Atoms The basic component of all matter. The atom is the smallest particle of an element that has all of the chemical properties of that element. Atoms.

Atoms

• The basic component of all matter.

• The atom is the smallest particle of an element that has all of the chemical properties of that element.

• Atoms consist of a nucleus of protons and neutrons surrounded by electrons.

http://www.ktf-split.hr/glossary/image/atom.gif

Elements

• A substance consisting of a single type of atom.

• It cannot be broken down into different kinds of matter.

http://www.rentrain.com/resources/Helium%20Safety.jpg

http://www.reachoutmichigan.org/funexperiments/agesubject/lessons/

handouts/helium.GIF

Combinations of Elements:Mixtures

• A substance consisting of two or more substances mixed together.

• Mixtures can usually be separated by mechanical means.

• Two or more substances mixed together in such a way that each remains unchanged.

http://www.seelecttea.com/

Combinations of Elements:Compounds

• A substance formed from two or more elements, with a fixed ratio determining the composition.

• The elements lose their individual chemical properties and the compound has new properties.

http://www.awwu.biz

Molecules

• Compound of two or more atoms, the smallest unit of chemical compounds.

• The smallest particle of a substance that has all of the physical and chemical properties of that substance.

http://www.awwu.biz

Formulas

• The formula which identifies the atoms and the number of each kind in the molecules of a compound.

• The number and types of atoms in a molecule.

Glucose Glucose -C-C66HH1212OO66

Formulas

6C6C66HH1212OO66

Elements in the compound:

Carbon

Hydrogen

Oxygen

Formulas:Subscripts

6C6C66HH1212OO66

# of atoms of each element in a molecule of the compound:

Carbon - 6

Hydrogen - 12

Oxygen - 6

Formulas:Coefficients

6C6C66HH1212OO66

# of molecules:

6 molecules of glucose