The atoms of different phosphorus isotopes __.
have different numbers of protonsreact differently with other atomshave different atomic numbershave different numbers of electronshave different numbers of neutrons
The Correct Answer and Explanation is :
The correct answer is: have different numbers of neutrons.
Explanation:
Isotopes are variants of a particular chemical element that share the same number of protons but differ in the number of neutrons within their atomic nuclei. This difference in the number of neutrons leads to varying atomic masses but does not affect the chemical behavior of the atoms significantly.
- Same Number of Protons: All phosphorus isotopes have the same number of protons (which is 15 for phosphorus). The number of protons defines the element itself. For example, phosphorus (P) always has 15 protons, whether it is the isotope phosphorus-31, phosphorus-32, or any other isotope. Therefore, phosphorus isotopes do not have different atomic numbers. The atomic number of phosphorus remains constant at 15.
- Different Numbers of Neutrons: The key difference between isotopes is the number of neutrons. Neutrons are neutral particles that exist in the nucleus alongside protons. For example, the most common isotope of phosphorus, phosphorus-31, has 16 neutrons (31 – 15 = 16), while phosphorus-32 has 17 neutrons. These differences in the number of neutrons give isotopes their different mass numbers (which is the sum of protons and neutrons).
- Effect on Chemical Properties: While isotopes of an element have different atomic masses due to varying numbers of neutrons, they generally have very similar chemical properties because they have the same number of electrons. Electrons are responsible for chemical reactions, and because the electron configuration is the same across isotopes of a given element, their chemical behavior remains largely unchanged.
- Other Considerations: Isotopes can have different stabilities, with some being radioactive. For instance, phosphorus-32 is a radioactive isotope, whereas phosphorus-31 is stable. Radioactive isotopes decay over time, emitting radiation.
In conclusion, phosphorus isotopes differ in the number of neutrons, which gives them distinct mass numbers but does not affect their chemical properties significantly.