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Which element has the smallest atomic radius?
Quick Answer
Helium has the smallest atomic radius of any element, because its electrons are held extremely close to the nucleus.
The Full Story
Helium has the smallest atomic radius, thanks to its tiny size and very strong nuclear attraction on just two electrons. Although atomic radii can be defined in different ways, helium is consistently at or near the smallest end of the periodic table. Its compact size helps explain its high ionization energy and low chemical reactivity. In many contexts, helium is the benchmark for the smallest neutral atom.
Key Facts
1.Helium has the smallest atomic radius
2.Element symbol: He
3.Atomic number: 2
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Suggested video title for this topic:
"The tiniest atom on the periodic table"
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