Multiple Choice
An isotope of titanium is represented as 48Ti. How many protons does this isotope of titanium have?
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2. Atoms & Elements
Isotopes
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How many neutrons are present in the isotope ruthenium-101 (Ru-101)?
A
44
B
101
C
101 - 44 = 47
D
57
Verified step by step guidance1
Identify the atomic number (Z) of ruthenium (Ru), which represents the number of protons. For ruthenium, Z = 44.
Recognize that the isotope notation Ru-101 indicates the mass number (A) is 101. The mass number is the total number of protons and neutrons in the nucleus.
Recall 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: \(N = 101 - 44\), which gives the number of neutrons in ruthenium-101.
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