In 1913, an Element Was Known to "Emanate" from Radium-226

question 109

Multiple Choice

In 1913, an element was known to "emanate" from radium-226 by  emission and then to decay to polonium-218, also by  emission. What was the unknown element?

• A)radon-222
• B)lead-214
• C)plutonium-238
• D)bismuth-214
• E)lead-218

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Definitions:

Balance Sheet Columns

The sections in a balance sheet showing assets, liabilities, and shareholders' equity at a specific point in time.

Net Income

The amount of money left over after all expenses, taxes, and costs have been subtracted from total revenue; also referred to as net profit.

Net Loss

The amount by which total expenses exceed total revenues in a specific period, indicating a negative financial performance.

End-of-period Spreadsheets

Financial documents prepared at the end of an accounting period, summarizing the financial status and performance of a business.