Question

What is the dichotomous key for non metals, metals, and metalloids?

1) Non metals, metals, and metalloids are classified based on their physical properties.
2) Non metals, metals, and metalloids are classified based on their chemical properties.
3) Non metals, metals, and metalloids are classified based on their atomic number.
4) Non metals, metals, and metalloids are classified based on their melting point.

Answer 1

Elements are classified as metals, nonmetals, or metalloids based on their physical properties like conductivity, malleability, ductility, and appearance. Option 1.

Step-by-step explanation:

The classification of elements as metals, nonmetals, and metalloids is based primarily on their physical properties. Metals are typically shiny, conductive of electricity and heat, malleable, and ductile. Nonmetals, on the other hand, are usually dull in appearance, poor conductors of electricity and heat, and brittle when solid. Metalloids exhibit properties intermediate between metals and nonmetals, which can be determined by their position on the periodic table near the zigzag dividing line. Therefore, the dichotomous key for classifying these elements would refer to their physical properties, particularly their conductivity, malleability, ductility, and luster. Option 1.