The Chart Below Shows Part of the Radioactive Series Beginning ${ } _ { 92 } ^ { 235 } \mathrm { U }$

question 35

Multiple Choice

The chart below shows part of the radioactive series beginning with the isotope ${ } _ { 92 } ^ { 235 } \mathrm { U }$ .The isotope marked with an X is

• A) \({ } _ { 88 } ^ { 226 } \mathrm { Ra }\) .
• B) \({ } _ { 88 } ^ { 227 } \mathrm { Ra }\) .
• C) \({ } _ { 89 } ^ { 227 } \mathrm { Ac }\) .
• D) \({ } _ { 90 } ^ { 231 } \mathrm { Th }\) .
• E) \({ } _ { 91 } ^ { 231 } \mathrm {~Pa}\) .

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Definitions:

Direct Labor-Hours

The aggregate of direct labor hours required for manufacturing a good or rendering a service.

Variable Overhead

Indirect production costs that vary with the level of output, including supplies and utilities necessary for production but not directly tied to specific products.

Efficiency Variance

The difference between the actual amount of resources used in production and the amount that should have been used, reflecting efficiency in resource usage.

Direct Materials

Raw materials that are directly used in the production of a product, easily traceable to the product itself.