The Elements Page 15 of INB EQ: Analyze how the periodic table is organized.

Atomic number: # of protons in the nucleus of an atom Uncharged atoms means: # of protons = # of electrons Symbol Basically the abbreviation for the element Average atomic mass # of Protons + # of Neutrons (amu) *See next slide How to use the periodic table…

Using the same number???  Mass Number  # on periodic table but ROUNDED  Average Atomic Mass  Actual # shown on periodic table  Average of all the elements isotopes  Atomic Mass Unit  Unit used to express g (gram) value of the atoms mass by comparing it to the mass of the carbon-12 atom * “Really” all the same # on periodic table

Groups (families):The Columns Elements in groups have similar chemical properties Periods: The Rows Elements properties vary across periods *Lanthanide Series and Actinide Series are the two outset rows at the bottom

Group/Family

Period/Row At the end of a sentence you put a ________.

2 Main Sections in Periodic Table MetalsNonmetals - Good Electrical and Heat Conductors - Contain properties of malleability, are ductile, and high tensile strength - Poor Electrical & Heat Conductors

2 Minor Sections in Periodic Table Metalloids Noble Gases - Stair step barrier between metals and nonmetals - Have characteristics of both metals and nonmetals - Semi-Conductors - At room temperature = ALL are solids - Unreactive - At room temperature = ALL are gases - Where neon lights and party balloons come from

REVIEW ELEMENTS HANDBOOK (page 784) As you read/skim write 3 facts about each group. Alkali, Alkaline Earth, Transition Metals, Boron, Carbon, Nitrogen, Oxygen, Halogens.

Page 17 of INB Answer questions on page 22 of your textbook 5-13 ODD, 14, 17, 18, 19, 21.