Electron Configuration and The Periodic table

• How do scientists categorize the periodic table?

  Into different blocks based on subshells
• What is the highest energy electron in the S block?

  S subshell
• What is the highest energy electron in the P block?

  P subshell
• What is the highest energy electron in the D block?

  D subshell
• What is the highest energy electron in the F block?

  F subshell
• How many electrons does silicon have?

  14 electrons
• What is the electron configuration of silicon?

  1s2 2s2 2p6 3s2 3p2
• How can you verify the electron configuration of silicon?

  By checking its position in the periodic table
• What do periods one, two, and three represent?

  First, second, and third electron shells
• What is the electron configuration of nickel?

  1s2 2s2 2p6 3s2 3p6 3d8 4s2
• What does the electron configuration of nickel indicate about its electrons?

  It shows the filling order of subshells
• Why does the 4s subshell fill before the 3d subshell?

  Because of energy levels in electron configuration
• What are the blocks of the periodic table and their highest energy electrons?

  • S block: Highest energy electron in S subshell
  • P block: Highest energy electron in P subshell
  • D block: Highest energy electron in D subshell
  • F block: Highest energy electron in F subshell
• How to write the shorthand electron configuration of elements?

  1. Identify the element's atomic number
  2. Determine the electron configuration
  3. Use noble gas notation for shorthand