The size of argon is greater than chlorine because of the interelectronic repulsions start taking place when an atom attain its octet. Argon atom is bigger than chlorine atom because,Chlorine atom has 3 outermost shells revolving around it and it has seven valence electrons and its valency is 1.
.
Hereof, why the atomic radius of argon is larger than all the member of third period?
This is because the number of protons increases (sodium has 11, argon has 18) so the nuclear charge increases. Therefore, the attraction between the positive nucleus and negative electrons in the outer shell increases, so the atomic radius (the distance between the nucleus and the outer shell) decreases.
Additionally, why does argon not follow the atomic radius trend? Notice that argon isn't included. Electronegativity is about the tendency of an atom to attract a bonding pair of electrons. Since argon doesn't form covalent bonds, you obviously can't assign it an electronegativity. The trend is explained in exactly the same way as the trend in atomic radii.
Also to know is, which element in period three has the largest atomic radius?
(B) Trends in the Atomic Radius of Elements in Period 3
| Element | Na | Mg |
|---|---|---|
| Simple Electron Configuration | 2,8,1 | 2,8,2 |
| Energy Level being filled (Valence Shell) | third (M) | third (M) |
| Nuclear Charge (charge on all protons) | 11+ | 12+ |
| Atomic Radius (pm) | 154 | 130 |
What is the atomic radius of argon?
188 pm
Related Question AnswersWhy does atomic size increase down a group?
In general, atomic radius decreases across a period and increases down a group. Down a group, the number of energy levels (n) increases, so there is a greater distance between the nucleus and the outermost orbital. This results in a larger atomic radius.How do you find atomic radius?
Divide the distance between the nuclei of the atoms by two if the bond is covalent. For example, if you know the distance between the nuclei of two covalently bonded atoms is 100 picometers (pm), the radius of each individual atom is 50 pm.What are the atomic numbers of the elements in period 2?
Period 2 contains the elements with the atomic numbers 3 through 10.Which element has the largest atomic radius?
The element which has the largest atomic radius is Cesium. Atomic Radius is defined as the distance between the center of the nucleus and the outermost shell of an atom. Cesium has 6 orbital shells, which means that it automatically is big.Is CL bigger than K+?
In other words, K+ has bigger effective nuclear charge than Cl− , which translates to a bigger net positive charge felt by the outermost electrons. This will compress the energy levels a bit and make the ionic radius smaller for the potassium cation. Therefore, the chloride anion will have the larger atomic radius.What element has the smallest atomic radius?
heliumWhich has the largest atomic radius magnesium?
Explanation: Given that atomic size decreases across a Period, the sodium atom is larger than that of magnesium. Both third row metals are larger than second row beryllium, inasmuch as the third Period metals build on the atomic radius (the electron shell) already possessed by the second Period.Which element has the highest ionization energy?
From this trend, Cesium is said to have the lowest ionization energy and Fluorine is said to have the highest ionization energy (with the exception of Helium and Neon).What is the smallest atom?
hydrogenWhich element has the largest electronegativity?
fluorineWhich element is the most reactive?
Fluorine is identified as the most electronegative element in the periodic table, making it the strongest oxidizing agent. It is the most reactive non-metal. Fluorine is so reactive that it can burn substances that one would generally think of as non-flammable!What is the smallest atom in period 3?
Why is argon the element with the smallest atomic size in period 3? - Quora.Why Argon has low melting point?
Argon relies on van der Waals forces however due to Argon's low mass the van der Waals forces are very weak. This means very little energy is required to overcome the forces, so the melting point is the lowest across the period.What is the transition metal with the smallest atomic mass?
General properties of the group| atomic mass | ||
|---|---|---|
| 1st main series | titanium | 47.867 |
| vanadium | 50.942 | |
| chromium | 51.996 | |
| manganese | 54.938 |
Which ion has the largest radius?
The ionic radii of cations follow the same trends as atomic radii. They increase from top to bottom and from right to left in the Periodic Table. Thus, the ion with the largest radius is closest to the lower left corner of the Periodic Table, and that is the K+ ion.What is the largest atom in the third period?
Atomic radius| Element | Symbol | Atomic radius /nm |
|---|---|---|
| sodium | Na | 0.191 |
| magnesium | Mg | 0.160 |
| aluminium | Al | 0.130 |
| silicon | Si | 0.118 |
What is the largest atom in period 3?
(B) Trends in the Atomic Radius of Elements in Period 3| Element | Na | Cl |
|---|---|---|
| Energy Level being filled (Valence Shell) | third (M) | third (M) |
| Nuclear Charge (charge on all protons) | 11+ | 17+ |
| Atomic Radius (pm) | 154 | 99 |
| General Trend | (largest) | → |
