An Element Has Two Different Isotopes: One That Weighs 65

question 74

Multiple Choice

An element has two different isotopes: one that weighs 65 amu and another that weighs 67 amu.If the average atomic mass of all the isotopes is 66.5 amu,what can be said about the relative abundance of the isotopes?

• A)The isotope with the mass of 67 is more abundant than the isotope with the mass of 65.
• B)The isotope with the mass of 65 is more abundant than the isotope with the mass of 67.
• C)The isotope with the mass of 66.5 is more abundant than the isotope with the mass of 67.
• D)The isotope with the mass of 66.5 is more abundant than the isotope with the mass of 65.
• E)All the isotopes have the same relative abundance.

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Definitions:

Transparency

The characteristic of an object or image that allows light to pass through it, resulting in it being see-through or translucent.

Dimensions

Refers to the measurable attributes of objects, such as height, width, and depth, often used in various scientific, engineering, and design fields.

Brightness

The level of light emitted from a screen or light source, which can be adjusted to make displays easier to see or to create mood lighting.

Contrast

The difference in luminance or color that makes an object distinguishable from other objects and the background.