Answer :
Final answer:
Strontium-89 has 38 protons and 38 electrons and contains 51 neutrons. The number 89 represents the combined total of protons and neutrons in the nucleus. Therefore, the atom is electrically neutral with an equal number of protons and electrons.
Explanation:
Understanding Strontium-89
Strontium-89 is a radioactive isotope of strontium, which is represented as Sr-89. The number 89 refers to the total number of protons and neutrons in the nucleus of the atom. In the case of strontium, the atomic number (number of protons) is 38, which indicates that it has 38 protons.
To find the number of neutrons in an atom, we can use the formula:
Number of Neutrons = Atomic Mass - Number of Protons
For strontium-89:
Number of Neutrons = 89 - 38 = 51
This means that strontium-89 contains 51 neutrons. Since an atom is electrically neutral and has an equal number of protons and electrons, strontium-89 also contains 38 electrons.
Therefore, regarding the statements provided, the correct answer would relate to the points concerning 38 electrons since electrons in a neutral atom equal the number of protons.
Conclusion
The truth about strontium-89 is summarized as follows:
- 38 protons
- 51 neutrons
- 38 electrons
Learn more about radioactive isotopes here:
https://brainly.com/question/40473897
