WarmUp

1
Warm-Up

• How many elements are represented by the chemical
  formula for sodium nitrate, NaNO3? Name them.
• What is the difference between CuSO4 (s) and
  CuSO4 (aq)?
• If salt, NaCl(s), is dissolved in water, H2O (l),
  how would you write the chemical formula for the
  resulting salt water solution?

2
Warm-Up

• How many elements are represented by the chemical
  formula for sodium nitrate, NaNO3? Name them.
• 3 different elements Na (sodium), N (nitrogen),
  O (oxygen)
• What is the difference between CuSO4 (s) and
  CuSO4 (aq)?
• CuSO4 (s) is a solid, CuSO4 (aq) is dissolved in
  water
• If salt, NaCl(s), is dissolved in water, H2O (l),
  how would you write the chemical formula for the
  resulting salt water solution?
• NaCl (aq)

3
Development of the Modern Periodic Table

• Pre-lab discussion
• Create a Table

4
Antoine Lavoisier

• 1743-1794
• French scientist
• Compiled a list of known elements (there were 23
  of them at the time)
• There was really no order to the list

5
Dmitri Mendeleev

• 1834-1907
• German chemist
• Connection between atomic mass and elemental
  properties
• Created the first useful and widely accepted
  periodic table
• Elements arranged in order of increasing atomic
  mass
• Into columns with similar properties

6
Mendeleevs Periodic Table
7
Henry Moseley

• 1887-1915
• English physicist/chemist
• Studied atomic number (the number of protons in
  the nucleus) for a variety of elements
• Decided to organize the periodic table by atomic
  number, not atomic mass

8
Modern Periodic Table
9
In the Lab

• Work in teams with one set of periodic table
  cards.
• Find Be, Mg, Ca, and Sr from the deck of cards,
  and arrange them in a column like Mendeleev did.
• With your team, decide how you can use the
  remainder of the cards to organize the elements
  into a table similar to Mendeleevs.
• Arrange the cards and answer the questions IN
  COMPLETE SENTENCES.