Electronic structure

• What are the groups in the periodic table ?

  the columns numbered - 1,2,3,4,5,6,7,0 (going across )
• What are the periods in the periodic table?

  the rows in the periodic table
• how many electrons can go in the first shell?


  2
• how many electrons can go in the second shell?


  8
• What can the group tell you about the electrons in an atom?


  how many electrons are in the outer shell
• What can the period tell you about the electrons in an atom ?


  how many shells an atom has
• What is the electronic configuration of lithium?


  2,1
• What is the electronic configuration of carbon?

  2,4
• What is the electronic configuration of neon?


  2,8
• What is the electronic configuration of sulfur?


  2,8,6
• What is the electronic configuration of potassium?


  2,8,8,1
• in what direction do you add the electrons?


  inside to out
• What happens to an atom when it gains an electron?


  it forms a negative ion
• What happens when it loses an electron?


  it forms a positive ion