Tin (Sn) Element: Protons, Electrons, and Neutrons

To identify the element with 50 protons and an atomic mass of approximately 118, you can follow these steps: 1. **Element Identification**: - The number of protons defines the element. The element with 50 protons is Tin (Sn) because elements are defined by their proton number (atomic number), and Tin has an atomic number of 50. 2. **Atomic Mass**: - The given atomic mass is approximately 118. Atomic mass is typically listed as a weighted average of the masses of an element's naturally occurring isotopes. Tin, indeed, has isotopes with masses close to 118. 3. **Electrons**: - In a neutral atom, the number of electrons equals the number of protons. Therefore, Tin (Sn) with 50 protons also has 50 electrons. 4. **Neutrons**: - The number of neutrons can be found using the formula: \[ \text{Number of Neutrons} = \text{Atomic Mass} - \text{Number of Protons} \] For Tin: \[ \text{Number of Neutrons} = 118 - 50 = 68 \] 5. **Atomic Number and Symbol**: - The atomic number is 50, and the symbol for Tin is Sn. So, to summarize: - **Element**: Tin (Sn) - **Atomic Number**: 50 - **Electrons**: 50 - **Neutrons**: 68 - **Symbol**: Sn