Periodic Table

• Who developed the modern periodic table?

  Dmitri Mendeleev
• How is the periodic table arranged?

  By atomic (proton) number, periods, and groups
• What do periods in the periodic table represent?

  Rows of elements with the same electron shells
• What information does the group number provide?

  Number of electrons in the outer shell
• What are the characteristics of elements in the same period?

  • Same number of electron shells
  • Varying number of electrons in outer shell
• What are the characteristics of elements in the same group?

  • Same number of electrons in outer shell
  • Similar chemical properties
• What are the four blocks of the periodic table?

  s block, p block, d block, f block
• What does the s block of the periodic table contain?

  Elements with electrons filling s sub-shells
• How can you determine the electron structure of an element?

  By reading the periodic table from top to bottom
• What is the electron configuration for elements in the s block?

  • Fills 1s, 2s, 3s, etc.
  • Includes elements like H, Li, Na, K
• What is the electron configuration for elements in the p block?

  • Fills 2p, 3p, 4p, etc.
  • Includes elements like B, C, N, O
• What is the electron configuration for elements in the d block?

  • Fills 3d, 4d, 5d, etc.
  • Includes transition metals like Fe, Cu, Zn
• What is the electron configuration for elements in the f block?

  • Fills 4f, 5f
  • Includes lanthanides and actinides
• What is the significance of the periodic table in chemistry?

  It provides information about electron shells and configurations
• How does the arrangement of the periodic table help in understanding elements?

  It shows relationships between electron configurations and properties