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 upper right region far left column far right column lower left region 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? the largest atoms are found in the bottom - left part of the periodic table, and the smallest atoms are found in the top - right part of the periodic table. 3. observe: choose ionization energy. ionization energy is shown by color. in which parts of the table do you find atoms with the highest, and the lowest, ionization energies?

Explanation:

Atomic radius increases down a group and decreases across a period. Ionization energy and electron - affinity generally increase across a period and decrease down a group. The largest atoms are in the lower - left due to more electron shells and lower effective nuclear charge. The smallest are in the upper - right as they have fewer electron shells and higher effective nuclear charge. High ionization energy is in the upper - right as it's hard to remove electrons from well - filled shells. Low ionization energy is in the lower - left as electrons are easily removed. High electron affinity is in the upper - right as atoms readily accept electrons, and low electron affinity is in the lower - left.

Answer:

1. 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

1. Largest atoms: Lower left part of the periodic table

Smallest atoms: Upper right part of the periodic table

1. Highest ionization energies: Upper right part of the periodic table

Lowest ionization energies: Lower left part of the periodic table