Question

which is the largest atom? smallest atom? largest: francium smallest: fluorine largest: francium smallest: helium largest: helium smallest: francium rewatch

Explanation:

Atomic size trends in the periodic table show that francium has the largest atomic radius among stable - naturally occurring elements due to its position at the bottom - left of the periodic table (larger number of electron shells and lower effective nuclear charge on outer electrons). Helium has a very small atomic size as it is in the top - right region of the periodic table (high effective nuclear charge and only one electron shell).

Answer:

Largest: Francium
Smallest: Helium