Question

introduction: the periodic table is so named because similar patterns repeat, or appear periodically, throughout the table. these patterns are referred to as periodic trends. question: how do atomic radius, ionization energy, and electron affinity change throughout the periodic table? 1. predict: based on your investigations in activities a and b, predict where in the periodic table you will typically find the following: largest atoms, smallest atoms, highest ionization energy, lowest ionization energy, highest electron affinity, lowest electron affinity. upper left region far left column lower left region upper right region far right column lower right region 2. observe: choose atomic radius from the drop - down menu to see the relative sizes of the elements. in which parts of the table do you find the largest and smallest atoms?

Explanation:

Atomic radius generally decreases across a period and increases down a group. Ionization energy and electron - affinity generally increase across a period and decrease down a group. Largest atoms are in the lower left (due to more electron shells and less effective nuclear charge), smallest in the upper right. Highest ionization energy and electron - affinity are in the upper right (more effective nuclear charge, smaller atomic radius). Lowest ionization energy and electron - affinity are in the lower left.

Answer:

• Largest atoms: Lower left region
• Smallest atoms: Upper right region
• Highest ionization energy: Upper right region
• Lowest ionization energy: Lower left region
• Highest electron affinity: Upper right region
• Lowest electron affinity: Lower left region