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Chemistry for Today: General, Orga...

9th Edition
Spencer L. Seager + 2 others
ISBN: 9781305960060

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BuyFindarrow_forward

Chemistry for Today: General, Orga...

9th Edition
Spencer L. Seager + 2 others
ISBN: 9781305960060
Textbook Problem

The time required for 1 2 of the atoms in a sample of a radioactive element to disintegrate is known as the element’s:

a. decay period.

b. lifetime.

c. radioactive period.

d. half-life.

Interpretation Introduction

Interpretation:

The term used for the time required for 12 of the atoms in a sample of a radioactive element to disintegrate is to be predicted.

Concept introduction:

Radioactive decay is the process that involves the emission of radiation by an unstable atomic nucleus. The atomic nucleus loses its energy. The process is spontaneous. It is also known as nuclear radiation.

Explanation

Reason for correct answer:

Radioactive decays are first order reactions and the half-life for first order reactions does not depend on its initial amount.

The time required for the concentration of the reactant to reduce to half of its initial concentration gives the half-life of the reaction. In other words, at half-life of the element, the half of the original sample is reacted or disintegrated.

Reason for incorrect options:

(a) Decay period does not corresponds to the time required for 12 of the atoms in a sample of a radioactive element to disintegrate

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