1.1.7 Electronic Structure

• What are the first three shell capacities?

  2,8,8.
• What do the electrons in an atom occupy?

  Innermost available shells.
• An atom of potassium has 1 electron in its outermost shell. In a chemical reaction, will potassium gain or lose 1 electron?

  Lose.
• Nitrogen has an atomic number of 7. What is the correct electron configuration for an atom of nitrogen?

  2,5.
• An atom of oxygen has 6 electrons in the outer shell. In a reaction, it gains 2 electrons. What is the charge of the oxide ion created?

  -2.
• What is the electronic structure of calcium?

  2, 8, 8, 2.