Electron Configuration

• What is the focus of BTEC Applied Science Unit One in chemistry?

  Electron configuration
• Where are electrons located in an atom?

  Electrons are located in shells around the nucleus
• What are the principal quantum numbers for electron shells?

  n equals one, two, three, etc.
• What are the names of the subshells in electron configuration?

  The subshells are called s, p, d, and f
• How many orbitals does each subshell contain?

  The s subshell has 1 orbital, p has 3, and d has 5
• What is the maximum number of electrons that each orbital can hold?

  Each orbital can hold a maximum of 2 electrons
• How many electrons can the first shell hold?

  The first shell can hold 2 electrons
• How many electrons can the second shell hold?

  The second shell can hold 8 electrons
• How many electrons can the third shell hold?

  The third shell can hold 18 electrons
• What is the electron configuration for fluorine with 9 electrons?

  1s2 2s2 2p5
• What is the basic structure of an atom?

  Atoms have electrons whizzing around them in shells.
• What are the names of the shells that electrons occupy in an atom?

  The shells are named n=1, n=2, n=3, etc.
• What are the names of the subshells within each shell?

  The subshells are called s, p, d, and f.
• What is the maximum number of electrons that can occupy each orbital?

  Each orbital can hold a maximum of two electrons.
• What are the first three electron shells?

  The first three electron shells are n=1, n=2, and n=3.
• What subshells are present in the n=1, n=2, and n=3 shells?

  The n=1 shell has an s subshell, the n=2 shell has s and p subshells, and the n=3 shell has s, p, and d subshells.
• How many orbitals are in the s, p, and d subshells?

  The s subshell has 1 orbital, the p subshell has 3 orbitals, and the d subshell has 5 orbitals.
• How many electrons can the first shell (n=1) hold?

  The first shell (n=1) can hold a maximum of 2 electrons.
• How many electrons can the second shell (n=2) hold?

  The second shell (n=2) can hold a maximum of 8 electrons.
• How many electrons can the third shell (n=3) hold?

  The third shell (n=3) can hold a maximum of 18 electrons.
• What is the electron configuration of a fluorine atom?

  The electron configuration of fluorine is 1s^2 2s^2 2p^5.
• How do electrons fill the p subshell?

  Electrons fill the p subshell by first occupying the up spin orbitals before filling the down spin orbitals.
• What is the electron configuration of a calcium atom?

  The electron configuration of calcium is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2.
• What is the electron configuration of a magnesium ion (Mg2+)?

  The electron configuration of a magnesium ion (Mg2+) is 1s^2 2s^2 2p^6.
• What is the basic structure of an atom?

  • Atoms have electrons whizzing around them in shells
  • The shells are named n=1, n=2, n=3, etc.
  • The shells have subshells called s, p, d, and f
  • Each orbital can hold a maximum of 2 electrons
• What are the first three electron shells and their subshells?

  • n=1 shell has 1 s subshell
  • n=2 shell has 1 s and 3 p subshells
  • n=3 shell has 1 s, 3 p, and 5 d subshells
• What is the maximum number of electrons that can occupy each shell?

  • n=1 shell can hold 2 electrons
  • n=2 shell can hold 8 electrons
  • n=3 shell can hold 18 electrons
• What is the electron configuration of a fluorine atom?

  The electron configuration of fluorine is:

  1s^2 2s^2 2p^5
• What is the electron configuration of a calcium atom?

  The electron configuration of calcium is:

  1s^2 2s^2 2p^6 3s^2 3p^6 4s^2
• What is the electron configuration of a magnesium ion (Mg2+)?

  The electron configuration of a magnesium ion (Mg2+) is:

  1s^2 2s^2 2p^6