Cs, cesium: atomic radius is 0.265 phttp://wiki.answers.com/wiki/Picometre.
(However: Fr is the biggest with 0.265 nm, but naturally occuring only in extremely traces).
atom is the smallest part of element
The only non-radioactive isotope with the specified properties is silicon-28, which constitutes more than 90 % of naturally occuring silicon.
The smallest part of an element that occurs naturally is an atom. Atoms are the basic units of matter and contain protons, neutrons, and electrons.
Apparently uranium is the largest atom, with 92 protons and 92 electrons.
Element hassium has the largest Atomic Mass.
On the periodic table, there are two numbers for every element: the atomic number and the atomic weight. The numbers at the top of the square represents the number of protons present in the atom's nucleus of that element. This is called the atomic number. For example, the atomic number for the element Krypton is 36. That means that there are 36 protons in the nucleus. If there were not 36 protons in the nucleus of that atom, that would create the atom of a completely different element. For example, if one proton was to be removed from the nucleus of the atom for the element of Krypton that atom will be an atom of the element bromine. The number at the bottom of the square represents the number of particles present in the atom's nucleus of that element. This is known as the atomic weight. For example, the atomic weight for the element Krypton is 83.80.
The largest atom is francium and has 87 protons and 87 electrons.
Elements are matter made of one kind of atom.elements
An element is a substance made of only one kind of atom. There are 92 naturally occurring elements on the periodic table. Each element is characterized by a unique number of protons in its nucleus.
Bismuth Francium has the largest atom - the greatest atomic radius.
electrons are found in the nucleus of an atom
Francium has the largest atomic radius among all elements.