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
○ döbereiner and newlands
○ newlands and mendeleev
○ lavoisier and döbereiner

Explanation:

To solve this, we recall the work of chemists in organizing elements:

• Antoine Lavoisier categorized elements into metals, non - metals, and gases (also considered states like solid/liquid and reactivity).
• Johann Wolfgang Döbereiner grouped elements into triads based on similar properties (including reactivity and physical states to some extent).
• Dmitri Mendeleev is known for the periodic table based on atomic mass and properties, but the question's focus on early organization with properties like state and reactivity points more to Lavoisier and Döbereiner. Newlands' law of octaves was about atomic weight and repeating properties every 8 elements, which is less about the specific properties in the question. So the pair Lavoisier and Döbereiner is correct.

Answer:

D. Lavoisier and Döbereiner