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www.reference.com/science/element-largest-atomic-radius-614d79a24e5c2332

The element that has the largest atomic radius is cesium. It has an atomic radius of 298 pm, or picometers. An alkali metal, cesium is so active that it instantly explodes if dropped into cold water. It's also one of the few metals that becomes a liquid at close to room...

www.reference.com/article/atomic-radius-96ba9cf80af5d6bf

The atomic radius describes the size of the atom, and although there is no standard definition for the value, it is the distance between the nucleus and the outermost electrons. Atomic radii tend to increase moving down the periodic table, but they decrease moving left ...

www.reference.com/article/atomic-radius-change-dfa85446e61033fa

The atomic radius of an atom is determined by the total number of electrons, electron shells and protons in an atom. Protons are located in the nucleus of an atom and create an effective nuclear charge. Electrons within a shell are attracted to the nuclear charge and va...

www.reference.com/article/element-second-period-largest-atomic-radius-6fd61ee4664ce046

The chemical element in the second period with the largest atomic radius is lithium, which is followed by beryllium, boron, carbon and nitrogen. The elements with the smallest atomic radius in this period are neon, fluorine and oxygen, respectively.

www.reference.com/article/define-atomic-radius-45bc1d8b16535cf

The term "atomic radius" refers to the measured distance between the nucleus of an atom and the furthest orbiting electron. The outermost electron is referred to as a valance electron. The effective nuclear charge of an atom directly affects the size of the atom and the...

www.reference.com/article/atomic-radius-carbon-atom-36e16b5a717a4f98

The atomic radius of carbon atom is 70 picometers. The picometer is a very small unit of length, and 1 picometer = 1 x 10-12 meters. The atomic radius is the distance between the nucleus of the atom and the electrons in the outermost shell of the atom.

www.reference.com/article/one-atoms-largest-radius-b62f16f4b1120f75

As of 2014, the atom on the periodic table of elements with the largest known radius is cesium, which has a radius of 298 picometers. For comparison, helium has a radius of 31 picometers. The radius has not been determined for all elements.