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Which element has the greatest atomic radius?
Quick Answer
Francium is generally considered the element with the largest atomic radius, though exact values are estimated.
The Full Story
Francium is usually placed at the bottom of Group 1 and is commonly described as having one of the largest atomic radii, because atomic size increases down a group. Since francium is very rare and radioactive, its exact radius is not directly measured with high precision. Its large size helps explain its low ionization energy and high reactivity. Cesium is often used as a practical comparison because it is the heaviest stable alkali metal.
Key Facts
1.Francium is at the bottom of Group 1
2.Element symbol: Fr
3.Atomic number: 87
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Suggested video title for this topic:
"The atom with the biggest electron cloud in the group"
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