A $1.0$ -Mol Sample of an Isotope Is Decaying with a Half-Life

question 88

Short Answer

A $1.0$ -mol sample of an isotope is decaying with a half-life of $28 \mathrm { y }$ . After $61 \mathrm { y }$ , how man moles of this isotope are left and what is its activity in Bq?

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Definitions:

Antagonist

A substance that impedes or counteracts the action of another, especially a muscle that opposes the action of another muscle.

Synaptic Knob

The part of a neuron that releases neurotransmitters to transmit signals to another neuron or muscle cell.

Neuromuscular Junction

The synapse or junction where a motor neuron transmits a signal to a muscle fiber causing it to contract.

Muscle Fiber

An individual muscle cell, long and cylindrical, which contracts to produce movement.