Classify the following elements as metals, nonmetals, or semimetals: (a) Ar (b) Sb (c) Mo (d) Cl (e) N (f) Mg

Key Concepts

Periodic Table Classification

Elements are classified into metals, nonmetals, and semimetals based on their properties and positions in the periodic table. Metals, typically found on the left side and in the center, are good conductors of heat and electricity, while nonmetals, located on the right, are generally poor conductors. Semimetals, or metalloids, exhibit properties of both metals and nonmetals and are found along the zig-zag line separating the two categories.

Properties of Metals

Metals are characterized by their malleability, ductility, and high electrical and thermal conductivity. They tend to lose electrons during chemical reactions, forming positive ions. Common examples include elements like magnesium (Mg) and molybdenum (Mo), which are used in various industrial applications due to their strength and conductivity.

Properties of Nonmetals

Nonmetals are elements that typically gain or share electrons in chemical reactions, forming negative ions or covalent bonds. They are usually poor conductors of heat and electricity and can exist in various states at room temperature, such as gases (like argon, Ar) or solids (like nitrogen, N). Nonmetals play crucial roles in biological systems and are essential for life.