What is the atomic radius periodic pattern?

Answer 1

In general, the radius gets smaller as you go from left to right across the same period. This is true for all the periods. The radius starts large on the left, then tends to get smaller to the right.

Answer 2

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. Since the boundary is not a well-defined physical entity, there are various non-equivalent definitions of atomic radius.

Depending on the definition, the term may apply only to isolated atoms, or also to atoms in condensed matter, covalently bound in molecules, or in ionized and excited states; and its value may be obtained through experimental measurements, or computed from theoretical models. Under some definitions, the value of the radius may depend on the atom's state and context.[1]

The concept is difficult to define because the electrons do not have definite orbits, or sharply defined ranges. Rather, their positions must be described as probability distributions that taper off gradually as one moves away from the nucleus, without a sharp cutoff. Moreover, in condensed matter and molecules, the electron clouds of the atoms usually overlap to some extent, and some of the electrons may roam over a large region encompassing two or more atoms.

Despite these conceptual difficulties, under most definitions the radii of isolated neutral atoms range between 30 and 300 pm (trillionths of a meter), or between 0.3 and 3 angstroms. Therefore, the radius of an atom is more than 10,000 times the radius of its nucleus (1-10 fm),[2] and less than 1/1000 of the wavelength of visible light (400-700 nm).

The approximate shape of a molecule of ethanol, CH3CH2OH. Each atom is modeled by a sphere with the element's Van der Waals radius.

For many purposes, atoms can be modeled as spheres. This is only a crude approximation, but it can provide quantitative explanations and predictions for many phenomena, such as the density of liquids and solids, the diffusion of fluids through molecular sieves, the arrangement of atoms and ions in crystals, and the size and shape of molecules.[citation needed]

Atomic radii vary in a predictable and explicable manner across the Periodic Table. For instance, the radii generally decrease along each period (row) of the table, from the alkali metals to the noble gases; and increase down each group (column). The radius increases sharply between the noble gas at the end of each period and the alkali metal at the beginning of the next period. These trends of the atomic radii (and of various other chemical and physical properties of the elements) can be explained by the electron shell theory of the atom; they provided important evidence for the development and confirmation of quantum theory.

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Answer 3

Yes. the atomic radii of the elements tend to decrease across the periodic table from left to right (because the pull from the nuclii increases from left to right) and from bottom to top (because the number of electron shells is decreased)

Answer 4

Atomic radius will increase down a group as the number of shells (or energy levels) increases. Atomic radius will decrease across a period (from left to right) as the effective nuclear charge increases.

Answer 5

Yes it is a periodic property.It increases as we move down a group due to increase

in th shells. Atomic radius decreases as we from left to right across a period due to increase in effective nuclear charge.

Therefore, it can be said as a periodic property.