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AssignmentMultiple Choice

The History and Arrangement of the Periodic Table

Question 1 • AZ-Chemistry A-CR

What is the correct chronological order of scientists contributing to the modern periodic table?

Answer
A
Lavoisier, Newlands, Moseley, Dobereiner, and Mendeleev
B
Lavoisier, Dobereiner, Newlands, Mendeleev, and Moseley
C
Moseley, Mendeleev, Newlands, Dobereiner, and Lavoisier

Explanation

The scientists’ contributions came in this order: Lavoisier’s early classification of elements in 1789, Döbereiner’s triads around 1829, Newlands’s law of octaves in the 1860s, Mendeleev’s periodic table in 1869, and Moseley’s atomic-number arrangement in the early 1900s. Therefore, the correct choice is “Lavoisier, Dobereiner, Newlands, Mendeleev, and Moseley.”

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