Question

The early attempt to classify elements as metals and non-metals was made by:

• A. Mendeleev
• B. Lothar Meyer
• C. Lavoisier
• D. Henry Moseley

Hint:

Lavoisier is known as the “Father of Modern Chemistry” and was the first to classify elements into metals and non-metals.

Answer 1

The Correct Option is C

Step 1: Recall the historical development of classification of elements. The earliest systematic attempt to classify elements was made in the 18th century. Step 2: Identify the correct scientist. Antoine Lavoisier (1789) classified known elements into:

Metals
Non-metals
Gases
Earths
This was the first known classification based on physical properties. Step 3: Analyze the other options.

(A) Mendeleev — periodic table based on atomic mass
(B) Lothar Meyer — periodicity based on atomic volumes
(D) Henry Moseley — modern periodic law based on atomic number
Step 4: Final conclusion. The early attempt to classify elements as metals and non-metals was made by Lavoisier. \[ \boxed{\text{(C)}} \]