How Is the Half-Life of a Radioactive Parent Isotope Defined

question 40

Multiple Choice

How is the half-life of a radioactive parent isotope defined?

• A) the time it takes for half of the parent isotope to decay
• B) half the time it takes for the amount of parent isotope to reach zero
• C) the time it takes the parent isotope to go through half the decay steps necessary to produce a stable daughter isotope
• D) half of the average rate of decay of the parent isotope

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Definitions:

HBr

Hydrogen bromide; a diatomic molecule consisting of hydrogen and bromine, known for its use as a reagent in organic synthesis.

Allyl Cation

A positively charged ion (cation) with the formula C3H5+, characterized by a carbon atom connected to two other carbons via double bonds in a linear arrangement.

Carbon p Orbitals

Atomic orbitals composed of p electrons in carbon atoms, crucial for the formation of covalent chemical bonds through overlap.

Resonance Structures

Different forms of a molecule that have the same arrangement of atoms but differ in the placement of electrons, illustrating the delocalization of electrons within the molecule.