When a Radioactive Isotope Decays by Electron Capture, the Electron

question 24

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

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Definitions:

Π Molecular Orbital

A molecular orbital formed from the side-by-side overlap of atomic orbitals, having a nodal plane that passes through the nuclei.

Allyl Anion

A reactive ion derived from allyl compounds, notable for its use in organic synthesis as a nucleophile.

Concerted Reaction

A chemical reaction in which all bonds are broken and formed in a single step, typically involving a cyclic transition state.

Allylic Halide

A halogenated compound where the halogen atom is positioned adjacent to a carbon-carbon double bond.