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en.wikipedia.org/wiki/Atomic_radius

The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons. Since the boundary is not a well-defined physical entity, there are various non-equivalent definitions of atomic radius.

www.thoughtco.com/definition-of-atomic-radius-604377

The atomic radius of an element tends to increase as one goes down an element group. The reason is that the electrons become more tightly packed as you move across the periodic table, so while there are more electrons for elements of

www.khanacademy.org/.../periodic-table-trends-bonding/v/atomic-radius-trend

Voiceover: Let's think a little bit about the notion of atomic size or atomic radius in this video. At first thought, you might think well this might be a fairly straight-forward thing. If I'm trying to calculate the radius of some type of circular object I'm just thinking about well what's the ...

chemdictionary.org/atomic-radius

The atomic radius is the size of the atom, typically measured by the distance from the nucleus of the atom to the electron clouds around the nucleus. As there are no physical existence of orbital in atoms, it is difficult to measure the atomic radius. Thus sometime different methods are used to measure the radius while they are bonded in a molecule.

courses.lumenlearning.com/cheminter/chapter/periodic-trends-atomic-radius

Atomic radius is determined as the distance between the nuclei of two identical atoms bonded together. The atomic radius of atoms generally decreases from left to right across a period. The atomic radius of atoms generally increases from top to bottom within a group.

en.wikipedia.org/wiki/Atomic_radii_of_the_elements_(data_page)

Atomic radii of the elements (data page) Jump to navigation Jump to search. The atomic radius of a chemical element is the distance from the centre of the nucleus to the outermost shell of the electron. Since the boundary is not a well-defined physical entity, there are various non-equivalent definitions of atomic radius.

www.thoughtco.com/difference-between-atomic-radius-and-ionic-radius-603819

The atomic radius is a term used to describe the size of the atom, but there is no standard definition for this value. Atomic radius may actually refer to the ionic radius, as well as the covalent radius, metallic radius, or van der Waals radius.

chem.libretexts.org/.../Atomic_and_Molecular_Properties/Atomic_Radii

Definition. Atomic radius is generally stated as being the total distance from an atom’s nucleus to the outermost orbital of electron. In simpler terms, it can be defined as something similar to the radius of a circle, where the center of the circle is the nucleus and the outer edge of the circle is the outermost orbital of electron.

www.chemguide.co.uk/atoms/properties/atradius.html

ATOMIC RADIUS. Measures of atomic radius. Unlike a ball, an atom doesn't have a fixed radius. The radius of an atom can only be found by measuring the distance between the nuclei of two touching atoms, and then halving that distance.

sciencetrends.com/atomic-radius-trend

The atomic radius trend describes how the atomic radius changes as you move across the periodic table of the elements. In general, the atomic radius of an element tends to increase as you move down an element group in the periodic table.. To understand why this happens it would be helpful to take a close look at the definition of atomic radius and the radius of different elements in the ...