The Periodic Table of Elements

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Metals are good conductors of heat and electricity, have high melting and boiling points, and are malleable and ductile.

112.411

Most elements in the periodic table are solids.

About 75% of the periodic table is made up of metals.

Nonmetals are elements that are poor conductors of heat and electricity, and they are located on the right side of the periodic table.

The atomic number of an element represents the number of protons in the nucleus of an atom, which determines the element's identity.

The periodic law states that the properties of elements are a periodic function of their atomic numbers.

Metalloids have properties that are intermediate between metals and nonmetals; they can conduct electricity better than nonmetals but not as well as metals.

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.