Today’s Agenda: Notes on the periodic table Periodic table activity HW: Read section 6-1 and answer questions 1-6 on page 158

Periodic Table of the Elements:

hot / cold moist / dry Periodic Table of the Elements:

In the 1800’s, chemists began using electricity and spectrometers to separate and identify elements Once they could measure the atomic mass, patterns began to emerge

Periodic Table of the Elements: In the 1800’s, chemists began using electricity and spectrometers to separate and identify elements Once they could measure the atomic mass, patterns began to emerge John Newland arranged the elements like musical octaves.

Periodic Table of the Elements:

Dmitri Mendeleev made the first periodic table.

Groups or Families

Periods

Representative Elements

Transition Elements

Metals, metaloids, nonmetals

Alkali metals

Alkaline earth metals

halogens

Noble gasses

Periodic Table of the Elements:

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Vocabulary: Atomic radius Half the distacne between two bonded atoms Electronegativity How strongly an atom attracts electrons Ionization energy Energy required to remove an electron from an atom.

Quick Work: 1.Turn to page Using the periodic table as a guide, describe the trends that you see in melting point, boiling point, and atomic radius for the alkali metals 3.Answer the “Thinking Critically” questions.

Homework: Read section 6-1 Answer questions 1-6 on page 158