If an Element, El, Has Two Isotopes with the Following

question 76

Multiple Choice

If an element, El, has two isotopes with the following masses and abundances: ³⁸El 38.012 amu 75.68%
⁴⁶El 45.974 amu 24.32%
What would be the identity of this element?

• A)Ar
• B)K
• C)Ca
• D)S
• E)Cl

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Definitions:

Refractory Threshold

The minimum duration needed after an action potential initiation during which another action potential cannot be triggered in a neuron.

Absolute Threshold

The minimum intensity of a stimulus that one can detect 50% of the time, marking the boundary between perceivable and imperceptible stimulus intensity.

Difference Threshold

The minimum difference in stimulation that a person can detect 50% of the time; also known as the just noticeable difference (JND).

Relative Magnitude

The perceived size or importance of one quantity in comparison to another.