place the following in order of increasing radius. cl- ar k ,Cl- Ar K: Placing Them in Order of Increasing Radius

Cl- Ar K: Placing Them in Order of Increasing Radius

When it comes to atomic and molecular structures, the radius of an atom or ion can be a fascinating topic. In this article, we will explore the elements Cl, Ar, and K, and place them in order of increasing radius. Let’s delve into the details of each element and understand their atomic radii.

Chlorine (Cl)

Chlorine is a halogen element with an atomic number of 17. It is located in Group 17 of the periodic table. Chlorine has a relatively small atomic radius of about 99 picometers (pm). This is due to the fact that chlorine has a higher effective nuclear charge compared to the other elements we will discuss. The increased nuclear charge attracts the electrons more strongly, pulling them closer to the nucleus and resulting in a smaller atomic radius.

Arsenic (As)

Arsenic is a metalloid element with an atomic number of 33. It is located in Group 15 of the periodic table. The atomic radius of arsenic is approximately 114 pm. This is slightly larger than that of chlorine, as arsenic has one more electron shell. The additional electron shell increases the distance between the nucleus and the outermost electrons, leading to a larger atomic radius.

Krypton (Kr)

Krypton is a noble gas element with an atomic number of 36. It is located in Group 18 of the periodic table. Krypton has the largest atomic radius among the three elements we are discussing, with a radius of about 116 pm. Noble gases have full valence electron shells, which makes them very stable. The stability of krypton’s electron configuration contributes to its larger atomic radius compared to chlorine and arsenic.

Table: Atomic Radii of Cl, Ar, and K

Now that we have discussed the atomic radii of Cl, Ar, and K, let’s place them in order of increasing radius. Based on the information provided, the correct order is: Chlorine (Cl) < Arsenic (As) < Krypton (Kr). This order is determined by the increasing number of electron shells and the stability of the electron configuration.

In conclusion, the atomic radius of an element is influenced by various factors, including the effective nuclear charge and the electron configuration. By understanding these factors, we can determine the order of increasing radius for elements like Cl, Ar, and K. This knowledge can be useful in various scientific fields, such as chemistry and physics, where atomic and molecular structures play a crucial role.