Perhatikan notasi atom berikut. a. (}_{54)^131Xe

none

The given notation 54^131Xe is an atomic notation that represents a specific isotope of the element Xenon (Xe). Atomic notations typically include the atomic number and the mass number. In this notation:1. **Atomic Number (Z)**: The atomic number is the number located at the lower left of the element symbol. In this case, it's 54 for Xenon. The atomic number represents the number of protons in the nucleus of an atom of the element. It also defines the element's identity and its position on the periodic table. Since every atom of Xenon has 54 protons, the atomic number of Xenon is always 54.2. **Mass Number (A)**: The mass number is the number located at the upper left of the element symbol. In this case, it's 131. The mass number is the total count of protons and neutrons in an atom's nucleus. It is important to note that the mass number is not found on the periodic table but is important in distinguishing between different isotopes of an element.3. **Isotopes**: Isotopes are atoms of the same element (thus having the same atomic number) but with different numbers of neutrons, resulting in different mass numbers. Xenon (Xe), like all elements, can have various isotopes, each defined by its mass number. The isotope represented by 54^131Xe has 54 protons (as per the atomic number of Xenon) and 77 neutrons (calculated as the mass number minus the atomic number: 131 - 54 = 77).This atomic notation is commonly used in the field of chemistry and nuclear physics to specify isotopes, which are essential in understanding the behavior of elements in different chemical and physical processes.