Multiple Choice
Which of the following is closest to the natural abundance of the isotope Br-79?
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Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How many neutrons are present in the isotope manganese-54?
A
25
B
27
C
54
D
29
Verified step by step guidance1
Identify the atomic number (Z) of manganese, which is the number of protons. For manganese, Z = 25.
Recognize that the isotope notation manganese-54 means the mass number (A) is 54. The mass number is the total number of protons and neutrons in the nucleus.
Use the formula to find the number of neutrons (N): \(N = A - Z\).
Substitute the known values into the formula: \(N = 54 - 25\).
Calculate the difference to find the number of neutrons in manganese-54.
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