Elements Of Pure Economics
Element or elements may refer to: Science * Chemical element, a pure substance of one type of atom * Heating element, a device that generates heat by electrical resistance * Orbital elements, parameters required to identify a specific orbit of one body around another * DNA element, a functional region of DNA, including genes and cis-regulatory elements Mathematics * Element (category theory) * Element (mathematics), one of the constituents of a set * Differential element, an infinitesimally small change of a quantity in an integral * Euclid's ''Elements'', a mathematical treatise on geometry and number theory * An entry, or element, of a matrix. Philosophy and religion * Classical elements, ancient beliefs about the fundamental types of matter (earth, air, fire, water) * The elements, a religious term referring to the bread and wine of the Eucharist * Five elements (Japanese philosophy) Godai are the five elements in Japanese Buddhist thought of earth (''chi''), water ( ...
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Chemical Element
A chemical element is a species of atoms that have a given number of protons in their nuclei, including the pure substance consisting only of that species. Unlike chemical compounds, chemical elements cannot be broken down into simpler substances by any chemical reaction. The number of protons in the nucleus is the defining property of an element, and is referred to as its atomic number (represented by the symbol ''Z'') – all atoms with the same atomic number are atoms of the same element. Almost all of the baryonic matter of the universe is composed of chemical elements (among rare exceptions are neutron stars). When different elements undergo chemical reactions, atoms are rearranged into new compounds held together by chemical bonds. Only a minority of elements, such as silver and gold, are found uncombined as relatively pure native element minerals. Nearly all other naturally occurring elements occur in the Earth as compounds or mixtures. Air is primarily a mixture o ...
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