The order is: O (60 pm), Se (115 pm), K (220 pm), Cs (260 pm); these are covalent radii after Slater.
The atoms with the largest atomic radii are found in the lower right side of the periodic table. Smallest atoms are found in the higher left part of the periodic table. He has the smallest atomic radii.
Atomic radius increases down the group. So larger atomic radius are present at the bottom.
If the atoms are the same, it is the atomic radius.
Two atoms of same element (for a given isotope) are identical and hence have the same atomic radius.
Atomic radius decreases across a row (increasing positive charge in the nucleus causes electrons in the same energy level to "shrink" into the nucleus due to electrostatic attraction). This means that potassium has the largest atomic radius in period 4.
The atoms with the largest atomic radii are found in the lower right side of the periodic table. Smallest atoms are found in the higher left part of the periodic table. He has the smallest atomic radii.
Atomic radius increases down the group. So larger atomic radius are present at the bottom.
From the given elements, potassium has the largest atomic radius.
If the atoms are the same, it is the atomic radius.
From the given elements, Mg has the largest atomic radius, hence the size.
The negative ionic radius is larger than the neutral atomic radius
Two atoms of same element (for a given isotope) are identical and hence have the same atomic radius.
The farther to the left and toward the bottom of the periodic table, the lower the electronegativity, and the larger the atomic radius. Calcium has a large atomic radius in comparison to elements in it's own period. What are you comparing calcium too? Calcium does have a large radius but not the largest, the largest is Cesium.
Atomic radius decreases across a row (increasing positive charge in the nucleus causes electrons in the same energy level to "shrink" into the nucleus due to electrostatic attraction). This means that potassium has the largest atomic radius in period 4.
Atomic radii have not been measured or calculated based on theoretical principles for all of the elements. However, based on the information available in the wikipedia tables of atomic radii it would appear that the largest atom will prove to be that of francium.
Atomic Radius means the size of the atoms, the distance from the atomic nucleus to the outermost electron orbital.
An atoms size is relative to the number of electrons an atom contains. Atoms with the least number of electrons are the smallest atoms. When atoms have the same number of electrons, the atom with the most protons will have the largest nuclear charge, and therefore be the smallest atom.