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Which element has the largest atomic radius in Group 1?
Quick Answer
Francium is generally expected to have the largest atomic radius in Group 1, though it is too rare for easy direct measurement.
The Full Story
Francium sits at the bottom of Group 1, and periodic trends predict that it should have the largest atomic radius in the group. Atomic radius increases down a group because extra electron shells are added. Francium is difficult to measure directly because it is so radioactive and scarce. Even so, its position in the periodic table makes it a textbook example of periodic trends.
Key Facts
1.Francium is at the bottom of Group 1
2.Symbol: Fr
3.Group 1 atomic size increases downward
YouTube Angle
Suggested video title for this topic:
"The biggest atom in the alkali metal family"
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