electron configuration

• Where are electrons located in an atom?


  Electrons are in shells around the nucleus
• What are the names of the subshells in electron configuration?

  The subshells are called s, p, d, and f
• What is the structure of the first three electron shells and their subshells?

  • n = 1: 1s (2 electrons)
  • n = 2: 2s (2 electrons) + 2p (6 electrons)
  • n = 3: 3s (2 electrons) + 3p (6 electrons) + 3d (10 electrons)
• How many orbitals does the s subshell have?

  The s subshell has one orbital
• How many orbitals does the p subshell have?

  The p subshell has three orbitals
• How many orbitals does the d subshell have?

  The d subshell has five orbitals
• How many electrons can the first shell hold?

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

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

  The third shell can hold eighteen electrons
• How do you represent the spin of electrons in orbitals?


  One electron is represented with an up arrow and the other with a down arrow
• What is the charge of a group one element when it forms an ion?


  Group one elements form a +1 ion
• What is the charge of a group two element when it forms an ion?


  Group two elements form a +2 ion
• What is the charge of a group seven element when it forms an ion?


  Group seven elements form a -1 ion
• What is the charge of a group zero element when it forms an ion?


  Group zero elements do not typically form ions
• What is the maximum number of electrons that can be held in each shell?

  • First shell: 2 electrons
  • Second shell: 8 electrons
  • Third shell: 18 electrons