Unit+03+Atoms+and+the+Periodic+Table


 * < ==**Unit Notes**== ||< ==**Assignments**== ||
 * < * Unit Bellringers Click
 * Unit Notes Click
 * Periodic Table Families Notes (Blank) [|Click]
 * The Periodic Table Click
 * Periodic Table Family Notes Click ||< * The Atom Click
 * Calculating p/n/e WS Click
 * Creating your Periodic Table [|Click]
 * Perodic Table Fun Packet Click
 * Practice Test (study guide) Click
 * Practice Test Answer Key Click ||


 * = ===**Student Must Know**=== ||= ===**Key Words**=== ||
 * ==**The Atom**==

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 * An element is matter that is composed of one type of atom, which is the smallest piece of matter that still retains the property of that element.
 * The positively charged center of the atom is the nucleus.
 * Protons are in the nucleus and have a positive charge, neutrons are in the nucleus and have no charge, and electrons are in the electron cloud outside the nucleus and they have a negative charge.
 * The nucleus contains most of an atom’s mass.
 * Average atomic mass is the average number of protons and neutrons in an atom of an element.media type="youtube" key="y6QZRBIO0-o" width="296" height="245" align="right"
 * Atomic number is the number of protons in an atom while the mass number is the number of protons and neutrons in an atom.
 * Isotopes of the same element have differing neutron numbers.


 * Electron dot diagrams use the symbol of the element and dots around it representing electrons in the outermost energy level.

**The Periodic Table**
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media type="youtube" key="zGM-wSKFBpo" width="296" height="245" align="right" -atom -nucleus -proton -neutron -electron -electron could -atomic mass -atomic number -mass number -isotope -average atomic mass -periodic table -group -period -electron dot diagram -Lewis Dot -valence electrons -alkali metals -alkaline earth metals -halogens -noble gases -transition metals -boron family -carbon family -nitrogen family -oxygen family -nonmetals -metalloids ||
 * Elements are arranged in the periodic table by atomic number.
 * Groups are vertical columns and periods are horizontal rows.
 * Elements in the same group have similar properties.
 * Alkali metals are in group 1 and are very reactive.
 * Alkaline earth metals are in group 3 and have 2 outermost electrons.
 * Transition metals are in groups 3-12.
 * Nonmetals are elements that are gases or brittle solids at room temperature.
 * Halogens are in group 17 and are very reactive.
 * Noble gases are in group 18 and are chemically stable due to its outer energy level being full of electrons.
 * Metalloids have metallic and nonmetallic properties.
 * The boron family is group 13 and have 3 valence electrons.
 * The carbon family is group 14 and have 4 valence electrons.
 * The nitrogen family is group 15 and have 5 valence electrons.
 * The oxygen family is group 16 and have 6 valence electrons.
 * Trends of atoms are easy to visualize using periodic table. || -element