Multiple Choice
On another planet, the isotopes of titanium have different numbers of which subatomic particle?
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2. Atoms & Elements
Isotopes
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Which element corresponds to a neutral isotope with a mass number of 65 and 36 neutrons?
A
Zn
B
Cu
C
Ga
D
Br
Verified step by step guidance1
Recall that the mass number (A) of an isotope is the sum of the number of protons (Z) and neutrons (N): \(A = Z + N\).
Given the mass number \(A = 65\) and the number of neutrons \(N = 36\), use the formula to find the number of protons: \(Z = A - N = 65 - 36\).
Calculate \(Z\) to find the atomic number, which identifies the element on the periodic table.
Use the atomic number \(Z\) to look up the corresponding element symbol on the periodic table.
Confirm that the element with atomic number \(Z\) matches one of the given options (Zn, Cu, Ga, Br) and that the isotope is neutral (number of protons equals number of electrons).
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