At the Time Dimitri Mendeleev Produced the First Periodic Table

question 31

Multiple Choice

At the time Dimitri Mendeleev produced the first periodic table of the elements, which of the following was not true?

• A) There were a little more than 60 known chemical elements.
• B) Chemists used the concept of atomic mass.
• C) Chemists knew that each element had distinct chemical behaviors.
• D) It was the mid-18th century.
• E) There were one or two new discoveries of chemical elements each year.

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Definitions:

Consequences

Consequences refer to outcomes or effects that directly result from actions or conditions, often implying a reaction to what has been done or what has occurred.

Accomplish

To achieve or complete successfully a task, goal, or objective.

Chance

The occurrence of events without apparent cause, or the unpredictable and uncontrollable aspect of happenings.

Control

In experimental research, the practice of limiting the influence of confounding variables to determine the effect of the independent variable on the dependent variable more accurately.