How many neutrons are in one atom of cs- 134?
The Correct Answer and Explanation is:
To determine the number of neutrons in one atom of Cs-134, follow these steps:
- Understand the isotope notation:
The symbol Cs-134 represents the isotope of cesium, where 134 is the atomic mass (the sum of protons and neutrons) of the atom. So, Cs-134 has an atomic mass of 134 atomic mass units (amu). - Determine the number of protons:
Cesium (Cs) is element number 55 on the periodic table, which means every atom of cesium has 55 protons in its nucleus. - Use the isotope mass to calculate neutrons:
The number of neutrons in an atom can be calculated using the formula: Neutrons=Atomic Mass−Number of Protons\text{Neutrons} = \text{Atomic Mass} – \text{Number of Protons}Neutrons=Atomic Mass−Number of Protons For Cs-134: Neutrons=134−55=79\text{Neutrons} = 134 – 55 = 79Neutrons=134−55=79 Therefore, one atom of Cs-134 contains 79 neutrons.
Explanation:
In atomic structure, the number of protons is fixed for each element and determines its identity. For cesium, the number of protons is always 55, as it is the atomic number. The atomic mass of an isotope is the total number of protons and neutrons. Since the atomic mass of Cs-134 is 134, subtracting the number of protons gives us the number of neutrons: 79.
This calculation works because isotopes of an element have the same number of protons but different numbers of neutrons. In the case of Cs-134, it is an isotope of cesium with 55 protons and 79 neutrons.
In summary, Cs-134 has 79 neutrons, which is essential for understanding its nuclear properties and behavior, including its stability and radioactivity.
