Down a Column in the Periodic Table, the Ionization Energy

question 144

Multiple Choice

Down a column in the periodic table, the ionization energy ________

• A)increases because the n quantum number changes.
• B)increases because the quantum number changes.
• C)decreases because the outer electrons are further from the nucleus.
• D)increases because the atomic number (nuclear charge) increases.
• E)changes little because the outer electrons are all in the same outer shell.