When a Radioactive Isotope Decays by Electron Capture,the Electron ________

question 47

Multiple Choice

When a radioactive isotope decays by electron capture,the electron ________.

• A)combines with a neutron in the nucleus,raising the mass number of the daughter isotope by one
• B)combines with a proton in the nucleus; the atomic number of the daughter is one less than the parent
• C)makes the parent isotope into an ion with a charge of negative one
• D)makes the daughter isotope into an ion with a charge of positive one

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