Cobalt - 60 Has a Half-Life Equal TO₅

question 75

Multiple Choice

Cobalt - 60 has a half-life equal tO₅ .3 years. What fraction of cobalt - 60 remains undecayed after 21.2 years?

• A) 0.000
• B) 0.0625
• C) 0.125
• D) 0.250
• E) 0.500

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Definitions:

Neuron

A cell of the nervous system that transmits information through electrical and chemical signals.

Postsynaptic Potential

A change in membrane potential of the postsynaptic terminal of a synapse, typically induced by the binding of neurotransmitters.

Neurotransmitters

Chemical substances that transmit signals across a synapse from one neuron to another in the brain and nervous system.

Synaptic Cleft

The narrow space between the terminal button of a neuron and the dendrite or cell body of another neuron where neurotransmitters are released.