As you move from top to bottom within a group, the first ionization energy ________.

Write a chemical equation representing the second ionization energy for lithium. Use e⁻ as the symbol for an electron.

What is the reaction that corresponds to the first ionization energy of sodium, Na?

Which best explains why ionization energy tends to decrease from the top to the bottom of a group?

What is the general trend in ionization energy as you move down a column in the periodic table?

As you go from left to right across a period the first ionization energy generally?

What trend in ionization energy do you see as you move down a group?

Choose the element with the higher first ionization energy from each pair. a. Ge or Br b. P or In c. S or Te d. As or Br