Question

which two chemists organized elements based on properties such as how the elements react or whether they are solid or liquid?
lavoisier and mendeleev
dobereiner and newlands
newlands and mendeleev
lavoisier and dobereiner

Explanation:

To solve this, we recall the contributions of chemists to element organization:

• Lavoisier classified elements into metals, non - metals, gases, etc., based on properties like state (solid/liquid) and reactivity.
• Dobereiner grouped elements into triads based on similar properties (including reactivity and physical state - related trends).
• Mendeleev organized by atomic mass and chemical properties (but not the initial classification by state/reactivity as asked here).
• Newlands proposed the law of octaves, not the classification by state/reactivity as in the question.

So the chemists who organized elements based on properties like how they react or their state (solid/liquid) are Lavoisier and Dobereiner.

Answer:

D. Lavoisier and Dobereiner