Read more comments. Depending on context, both elements and components can be used interchangeably. Components always usually refer to parts, or sections. They may also refer to devices or electronics. Note; both component and element can be interchanged depending on your writing style. Element can refer to the elements found in nature. It is correct to say: "We breath the element oxygen. An element is a pure chemical substance made of same type of atom.
Composition Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds. They contain only one type of molecule. Elements that compose the compound are chemically combined. Elements contain only one type of atom. Each atom has the same atomic number i. Elements cannot be broken down into simpler substances by chemical reactions.
Representation A compound is represented using its chemical formula that represents the symbols of its constituent elements and the number of atoms of each element in one molecule of the compound. An element is represented using symbols.
Types A huge, virtually limitless, number of chemical compounds can be created. Compounds are classified into molecular compounds, ionic compounds, intermetallic compounds and complexes. There are about elements that have been observed. Can be classified as metal, non-metal or metalloid. Differences in Properties Elements are distinguished by their name, symbol, atomic number, melting point, boiling point, density and ionization energies. Atomic number — the atomic number is denoted by the letter Z and is the number of protons present in the nucleus of the atom of element.
For e. Number of protons is also indicative of electric charge or number of electrons present in the nucleus which determines chemical properties of the element. Atomic Mass — the letter A indicates the atomic mass of the element which is the total number of protons and neutrons in the nucleus of an atom of the element.
Isotopes of the same elements differ in their atomic masses. Isotopes — isotopes of an element have the same number of protons in their nucleus but differ in the number of neutrons. Naturally occurring elements have more than one stable isotope. Thus isotopes have similar chemical properties due to same number of protons but different nuclear properties due to different number of neutrons. Allotropes — atoms of an element can form bonds with each other in more than one way leading to difference in their chemical properties.
Visualizing the Differences This picture shows the differences between elements and compounds at an atomic level. The periodic table of elements is ordered by ascending atomic number. The chemical elements are divided into the metals, the metalloids, and the non-metals. Metals, typically found on the left side of the periodic table, are:. In contrast, non-metals, found on the right side of the periodic table to the right of the staircase , are:. Metalloids have some characteristics of metals and some characteristics of non-metals.
Silicon and arsenic are metalloids. As of November, , elements have been identified the most recently identified was ununseptium, in Of these known elements, only the first 98 are known to occur naturally on Earth. The elements that do not occur naturally on Earth are the synthetic products of man-made nuclear reactions.
Hydrogen and helium are by far the most abundant elements in the universe. The remainder is dark matter, a mysterious substance that is not composed of chemical elements. Dark matter lacks protons, neutrons, or electrons.
Pure samples of isolated elements are uncommon in nature. Carbon is also commonly found in the form of coal, graphite, and diamonds. The noble gases e.
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