High School

The periodic table is mostly composed of:

A. nonmetals
B. metalloids
C. metals
D. semimetals

Answer :

Final answer:

The periodic table is mostly composed of metals, which occupy the majority of the space in the table. Nonmetals are found in the upper right corner, while metalloids are situated along the dividing line between metals and nonmetals. This classification highlights the differing properties of the elements based on their positions in the periodic table.


Explanation:

Understanding the Composition of the Periodic Table

The periodic table is primarily composed of metals, which occupy the left three-fourths of the table. These elements are often characterized by their shiny appearance and high conductivity of heat and electricity. In contrast, nonmetals, found in the upper right corner, are generally dull and poor conductors, while metalloids, located along the line separating metals and nonmetals, exhibit properties of both categories.

Classification of Elements

The elements in the periodic table can be broadly classified into three categories:

  1. Metals: Examples include iron (Fe), copper (Cu), and gold (Au).
  2. Nonmetals: Examples include oxygen (O), sulfur (S), and carbon (C).
  3. Metalloids: Examples include silicon (Si) and arsenic (As), which have qualities of both metals and nonmetals.

To summarize, the periodic table shows that metals dominate the structure, making up most of the elements.


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