What is the trend in atomic radius as you move down a group in the periodic table?
Correct Answer: Atomic radius increases down a group.
- Step 1: Understand what a group is in the periodic table. A group is a column of elements that have similar properties.
- Step 2: Know that as you move down a group, you are moving to elements that are lower on the table.
- Step 3: Realize that each time you go down to the next element in a group, an additional electron shell is added.
- Step 4: Understand that more electron shells mean that the outermost electrons are farther from the nucleus.
- Step 5: Conclude that because the outer electrons are farther away, the atomic radius (the size of the atom) increases.
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