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The number and arrangement of electrons orbiting in an atom's outer shell determine its chemical activity.
Opportunity Cost
The value of the next-best alternative that is foregone when making a decision, representing the trade-offs associated with choosing one option over another.
Differential Cost
The difference in cost between two alternative decisions or changes in output levels.
Direct Cost
Expenses that can be directly traced to producing specific goods or services, such as raw materials and direct labor.
Indirect Cost
Costs not directly traceable to a specific product or project, such as utilities or rent.
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