Essential Question: What are the building blocks of matter?

 AtomMolecule  ElementCompound  NucleusChemical Formula  ProtonIsotope  Neutron  Electron  Atomic Number  Atomic Mass  Chemical Symbol

 What matter is made of.

 Basic building blocks of all matter.  Different kinds of atoms make different kinds of elements.

 Basic substances that make up all matter.  Cannot be broken down into simpler substances.  90 natural elements; 118 total.  Examples: Carbon, oxygen, gold, silver.

 The small, dense center of the atom.

 A particle in nucleus with a POSITIVE charge.  Weight: 1 a.m.u. (atomic mass unit)

 A particle in nucleus with NO charge – it is “neutral.”  Weight: 1 a.m.u.

 Very small particle found in electron clouds orbiting around the nucleus of the atom.  They have a NEGATIVE charge.  Weight: 0 a.m.u.

 0lUE 0lUE

 9kg 9kg  Color/glue models into a timeline in your notebook.  Include Name, Year, Picture, and description.

 Distinguishes between different elements.  Number of PROTONS.  (Also the number of electrons!)  All elements have their own Atomic Number.

 The mass (weight) of the atom.  Equals PROTONS + NEUTRONS.

 An atom with additional neutrons.  The atom has more mass, but is identified as the same element.

 One or two letter abbreviation of each element.  Examples:  C – carbon;  Ca – calcium;  Ag – silver.

 Two or more atoms combined together with chemical bonds.  Examples:  Water (H2o) molecule;  Carbon dioxide (CO2) molecule.

 Type of molecule that is also a pure substance, because its elements are joined chemically – they can not be broken apart by normal physical means.

 The abbreviations that identify molecules.  Examples:  Glass – SiO2 – silicon dioxide.  Table salt – NaCl – sodium chloride.