An isotope of an element has 11 protons and 13 neutrons. What is the m...
An isotope of an element has 11 protons and 13 neutrons. The mass number is the total of protons and neutrons.
- Mass number = Protons + Neutrons
- For this isotope: 11 + 13 = 24
Now, for another isotope of the same element with 14 neutrons:
- Mass number = 11 + 14 = 25
The correct answer is 25.
An isotope of an element has 11 protons and 13 neutrons. What is the m...
Understanding Isotopes
When discussing isotopes, it's important to remember that they are variants of the same element that have the same number of protons but differ in the number of neutrons.
Key Components
- Protons: The number of protons defines the element. In this case, the element has 11 protons.
- Neutrons: The number of neutrons can vary, leading to different isotopes. Here, we have isotopes with 13 and 14 neutrons.
Calculating Mass Number
The mass number of an isotope is calculated by adding the number of protons and neutrons together.
- For the first isotope with 11 protons and 13 neutrons:
- Mass Number = Protons + Neutrons
- Mass Number = 11 + 13 = 24
- For the second isotope with 11 protons and 14 neutrons:
- Mass Number = Protons + Neutrons
- Mass Number = 11 + 14 = 25
Conclusion
Thus, the mass number of the isotope with 14 neutrons is 25. Therefore, the correct answer to the question is option b) 25.
This understanding of isotopes is fundamental in chemistry and helps explain the variations in atomic mass for elements on the periodic table.