Which of the following elements has the largest atomic radius?

Which of the following elements has the largest atomic radius?

Step 1: Understand what atomic radius means. Atomic radius is the size of an atom, usually measured from the nucleus to the outermost electron.
Step 2: Know that elements are organized in the periodic table. They are arranged in rows (periods) and columns (groups).
Step 3: Identify the group of elements. Group 1 elements are known as alkali metals, which include lithium, sodium, potassium, rubidium, cesium, and francium.
Step 4: Remember that atomic radius increases as you move down a group in the periodic table. This is because additional electron shells are added, making the atom larger.
Step 5: Find the element at the bottom of Group 1. Rubidium is lower than lithium, sodium, and potassium in Group 1.
Step 6: Conclude that rubidium has the largest atomic radius among the elements in Group 1 because it is the lowest in that group.

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