In the third period of the Periodic Table, sodium (Na) has the largest atomic radius. As you move from left to right across a period, the atomic radius decreases due to increasing nuclear charge, which pulls electrons closer to the nucleus. Sodium, being the first element in the period, has the least effective nuclear charge acting on its outer electrons, resulting in a larger atomic radius compared to the other elements in the third period.
Cesium (Cs), atomic number 55, has the largest atomic radius in period 6.Only francium (row 7) may be larger, but testing is difficult because francium does not exist in any meaningful amounts (maybe 30 g on the entire Earth).
Group-1 has largest atomic radius. It decreases across a period
The element in row 8 (period 8) with the largest atomic radius is oganesson (Og). Oganesson is a synthetic element and is located at the bottom of the periodic table, hence it has the largest atomic radius among the elements in that row.
This is a consequence of the law of periodicity of chemical elements.
Among the elements magnesium (Mg), chlorine (Cl), sulfur (S), and sodium (Na), sodium (Na) is the largest in terms of atomic radius. Atomic size generally increases down a group in the periodic table and decreases across a period. Sodium, being in Group 1 and having a lower atomic number than chlorine, has a larger atomic radius. Thus, Na is the largest of the elements listed.
Sodium has the largest atomic size in the third period.
Neon (Ne) in the second period on the periodic table of the elements has the highest atomic number in that period of 10.
Cesium (Cs), atomic number 55, has the largest atomic radius in period 6.Only francium (row 7) may be larger, but testing is difficult because francium does not exist in any meaningful amounts (maybe 30 g on the entire Earth).
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.
Group-1 has largest atomic radius. It decreases across a period
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 element in row 8 (period 8) with the largest atomic radius is oganesson (Og). Oganesson is a synthetic element and is located at the bottom of the periodic table, hence it has the largest atomic radius among the elements in that row.
This is a consequence of the law of periodicity of chemical elements.
Lithium.
The element in period 4 with the smallest atomic radius is argon. It has a smaller atomic radius compared to the other elements in period 4 because it is a noble gas with a full valence shell, resulting in a small atomic size.
the Atomic number on Periodic Table is the identity of an element in the table , it gives the indications about Group, period and Block of elements it also predicts the chemical and physical properties of the element.
In a given period, group 18 elements will have the highest atomic number.