객관식
How many neutrons are present in the isotope germanium-75?
103
views
2. Atoms & Elements
Isotopes
Multiple Choice
Arsenic has an atomic number of 33 and its most common isotope has a mass number of 75. How many neutrons are present in this isotope of arsenic?
A
33
B
42
C
108
D
75
검증된 단계별 안내1
Identify the atomic number of arsenic, which is given as 33. The atomic number represents the number of protons in the nucleus of the atom.
Note the mass number of the isotope, which is given as 75. The mass number is the total number of protons and neutrons in the nucleus.
Recall the relationship between mass number (A), number of protons (Z), and number of neutrons (N): \(A = Z + N\).
Rearrange the formula to solve for the number of neutrons: \(N = A - Z\).
Substitute the known values into the equation: \(N = 75 - 33\), which will give the number of neutrons in the isotope.
Related Videos
Related Practice
