Multiple Choice
How many protons are present in an atom of antimony (Sb)?
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- 1. Intro to General Chemistry3h 48m
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2. Atoms & Elements
The Atom
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 nucleus of a sodium atom with a mass number of 23?
A
12
B
11
C
10
D
23
Verified step by step guidance1
Identify the atomic number (Z) of sodium, which is the number of protons in the nucleus. For sodium, Z = 11.
Understand that the mass number (A) is the total number of protons and neutrons in the nucleus. Here, A = 23.
Use the relationship between mass number, protons, and neutrons: \(A = Z + N\), where \(N\) is the number of neutrons.
Rearrange the formula to solve for neutrons: \(N = A - Z\).
Substitute the known values: \(N = 23 - 11\), which gives the number of neutrons in the sodium nucleus.
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