Element

Element is a substance that cannot be broken down into simpler substances by chemical means. Elements are the fundamental materials of which all matter is composed.

Definition

An Element is a substance that cannot be broken down into simpler substances by chemical means. This definition is based on the atomic theory, which states that elements are made up of atoms. Each element is distinguished by the number of protons in its atoms. This number is known as the atomic number of the element.

Characteristics

Elements have unique physical and chemical properties. These properties include density, melting point, boiling point, and reactivity with other elements. The elements are classified into several categories based on their properties: metals, nonmetals, and metalloids.

Classification

Metals

Metals are elements that are good conductors of heat and electricity, and are malleable and ductile. They are generally shiny and solid at room temperature, with the exception of mercury, which is a liquid.

Nonmetals

Nonmetals are elements that are poor conductors of heat and electricity. They are not malleable or ductile and are often dull and brittle. They can be solid, liquid, or gas at room temperature.

Metalloids

Metalloids are elements that have properties of both metals and nonmetals. They are semi-conductors and can be shiny or dull.

Periodic Table

The Periodic Table is a tabular arrangement of the elements, organized based on their atomic number, electron configuration, and recurring chemical properties. Elements are listed in order of increasing atomic number, which corresponds to the number of protons in an element's atomic nucleus.

See Also

• Atom
• Chemical compound
• Chemical reaction
• Periodic Table

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