객관식
Which radioactive isotopes were discovered by Marie and Pierre Curie?
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2. Atoms & Elements
Isotopes
Multiple Choice
How many neutrons are present in an atom of silicon-30?
A
14
B
28
C
16
D
30
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검증된 단계별 안내1
Identify the atomic number (Z) of silicon, which is the number of protons in the atom. For silicon, Z = 14.
Recognize that the number 30 in silicon-30 represents the mass number (A), which is the total number of protons and neutrons in the nucleus.
Use the formula to find the number of neutrons (N): \(N = A - Z\).
Substitute the known values into the formula: \(N = 30 - 14\).
Calculate the difference to find the number of neutrons in silicon-30.
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