What does the number 84 in the name krypton-84 represent? This number is a crucial part of the atomic notation for krypton-84, an isotope of the element krypton. In this article, we will delve into the significance of this number and its implications in the field of nuclear physics.
Krypton, with atomic number 36, is a noble gas that belongs to Group 18 of the periodic table. Like other noble gases, krypton is known for its stability and lack of reactivity. However, krypton has several isotopes, which are atoms of the same element with different numbers of neutrons in their nuclei. Krypton-84 is one such isotope, with an atomic mass of 84.
The number 84 in the name krypton-84 refers to the total number of nucleons, which are protons and neutrons, in the nucleus of this isotope. Since krypton has an atomic number of 36, it means that krypton-84 has 36 protons. To find the number of neutrons, we subtract the atomic number from the atomic mass: 84 – 36 = 48. Therefore, krypton-84 has 48 neutrons in its nucleus.
The presence of different isotopes in an element is due to the varying number of neutrons in their nuclei. Isotopes of an element have the same chemical properties but may have different physical properties, such as mass and radioactivity. In the case of krypton-84, it is a stable isotope, meaning it does not undergo radioactive decay and has a relatively long half-life.
Understanding the composition of isotopes like krypton-84 is essential in various scientific fields, including nuclear physics, chemistry, and medicine. For instance, krypton-84 is used in medical imaging techniques such as computed tomography (CT) scans, where it serves as a contrast agent to enhance the visibility of internal organs.
In summary, the number 84 in the name krypton-84 represents the total number of nucleons in the nucleus of this isotope. This number is significant in determining the physical and chemical properties of krypton-84 and its applications in various scientific disciplines.
