Concept explainers
(a)
Interpretation:
The quantity of technetium-99 m should be calculated which remains from 160 mg sample after 6.0 hours half-life.
Concept Introduction:
The time which is required for a quantity to reduce to half of its initial value is known as half -life.
Or,
The time at which the reactant concentration is reduced to half of its initial concentration is known as half-life.
The expression for calculating amount left after decay of radioactive atom is shown as:
Where, t = number of half-lives that passed.
(b)
Interpretation:
The quantity of technetium-99 m should be calculated which remains from 160 mg sample after 18.0 hours half-life.
Concept Introduction:
The time which is required for a quantity to reduce to half of its initial value is known as half -life.
Or,
The time at which the reactant concentration is reduced to half of its initial concentration is known as half-life.
The expression for calculating amount left after decay of radioactive atom is shown as:
Where, t = number of half-lives that passed.
(c)
Interpretation:
The quantity of technetium-99 m should be calculated which remains from 160 mg sample after 24.0 hours half-life.
Concept Introduction:
The time which is required for a quantity to reduce to half of its initial value is known as half -life.
Or,
The time at which the reactant concentration is reduced to half of its initial concentration is known as half-life.
The expression for calculating amount left after decay of radioactive atom is shown as:
Where, t = number of half-lives that passed.
(d)
Interpretation:
The quantity of technetium-99 m should be calculated which remains from 160 mg sample after 2 days half-life.
Concept Introduction:
The time which is required for a quantity to reduce to half of its initial value is known as half -life.
Or,
The time at which the reactant concentration is reduced to half of its initial concentration is known as half-life.
The expression for calculating amount left after decay of radioactive atom is shown as:
Where, t = number of half-lives that passed.
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General, Organic, and Biological Chemistry - 4th edition
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