Why Was Helium Absent from Mendeleev's Original Periodic Table of 1871

question 112

Multiple Choice

Why was helium absent from Mendeleev's original periodic table of 1871?

• A)Helium is unstable.
• B)Helium is radioactive.
• C)Helium had not been discovered.
• D)Helium occurs only in compounds.
• E)none of the above

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Definitions:

Remedial Action

Actions taken to correct or mitigate a problem, often used in contexts of policy, environmental issues, or workplace errors.

Executive Action

Decisions or measures taken by an executive branch of government, including the President or executives within organizations, often involving policy enforcement or implementation.

Forecasting

Forecasting is the process of making predictions about future events or trends based on current and historical data analysis, widely used in fields such as economics, weather, and business planning.

Environmental Changes

Alterations in the surrounding conditions, including social, economic, political, and natural environments that can impact organizations and individuals.