Multiple Choice
Zinc has an atomic number of 30. How many neutrons are present in the most abundant isotope of zinc, Zn-64?
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2. Atoms & Elements
Isotopes
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 lithium-6?
A
3
B
4
C
6
D
2
Verified step by step guidance1
Identify the isotope notation: lithium-6 means the element is lithium (Li) with a mass number of 6.
Recall that the mass number (A) is the sum of protons and neutrons in the nucleus: \(A = Z + N\), where \(Z\) is the number of protons and \(N\) is the number of neutrons.
Determine the atomic number (\(Z\)) of lithium, which is 3 (lithium has 3 protons).
Use the formula to find the number of neutrons: \(N = A - Z\).
Substitute the values: \(N = 6 - 3\), which gives the number of neutrons in lithium-6.
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