# Can you estimate?

Chemistry Level 1

The above is the diagram of a helium atom, showing the electron probability density as shades of gray. The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the nucleus to the boundary of the surrounding cloud of electrons. By the way, Lithium ($$_3$$Li), Beryllium ($$_4$$Be), Boron ($$_5$$B) and Carbon ($$_6$$C) have the same number of electron shells but different atomic radii. Which one has the largest atomic radius?

×