Chemical element & Water - Unionpedia, the concept map

Air (classical element)

Air or Wind is one of the four classical elements along with water, earth and fire in ancient Greek philosophy and in Western alchemy.

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Alkali metal

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Alkaline earth metal

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Atmosphere of Earth

The atmosphere of Earth is composed of a layer of gas mixture that surrounds the Earth's planetary surface (both lands and oceans), known collectively as air, with variable quantities of suspended aerosols and particulates (which create weather features such as clouds and hazes), all retained by Earth's gravity.

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Atom

Atoms are the basic particles of the chemical elements.

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Biology

Biology is the scientific study of life.

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Bismuth

Bismuth is a chemical element; it has symbol Bi and atomic number 83.

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Boiling point

The boiling point of a substance is the temperature at which the vapor pressure of a liquid equals the pressure surrounding the liquid and the liquid changes into a vapor.

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Caesium

Caesium (IUPAC spelling; cesium in American English) is a chemical element; it has symbol Cs and atomic number 55.

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Calcium

Calcium is a chemical element; it has symbol Ca and atomic number 20.

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Carbon dioxide

Carbon dioxide is a chemical compound with the chemical formula.

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Chemical substance

A chemical substance is a unique form of matter with constant chemical composition and characteristic properties.

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Chlorine

Chlorine is a chemical element; it has symbol Cl and atomic number 17.

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Classical element

The classical elements typically refer to earth, water, air, fire, and (later) aether which were proposed to explain the nature and complexity of all matter in terms of simpler substances.

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Crystal structure

In crystallography, crystal structure is a description of ordered arrangement of atoms, ions, or molecules in a crystalline material.

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Cubic crystal system

In crystallography, the cubic (or isometric) crystal system is a crystal system where the unit cell is in the shape of a cube.

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Density

Density (volumetric mass density or specific mass) is a substance's mass per unit of volume.

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Deuterium

Deuterium (hydrogen-2, symbol H or D, also known as heavy hydrogen) is one of two stable isotopes of hydrogen (the other is protium, or hydrogen-1).

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Earth

Earth is the third planet from the Sun and the only astronomical object known to harbor life.

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Earth (classical element)

Earth is one of the classical elements, in some systems being one of the four along with air, fire, and water.

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Empedocles

Empedocles (Ἐμπεδοκλῆς;, 444–443 BC) was a Greek pre-Socratic philosopher and a native citizen of Akragas, a Greek city in Sicily.

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Fire (classical element)

Fire is one of the four classical elements along with earth, water and air in ancient Greek philosophy and science.

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Gallium

Gallium is a chemical element; it has the symbol Ga and atomic number 31.

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Gas

Gas is one of the four fundamental states of matter.

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Graphene

Graphene is an allotrope of carbon consisting of a single layer of atoms arranged in a honeycomb nanostructure.

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Hexagonal crystal family

In crystallography, the hexagonal crystal family is one of the 6 crystal families, which includes two crystal systems (hexagonal and trigonal) and two lattice systems (hexagonal and rhombohedral).

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Hydrogen

Hydrogen is a chemical element; it has symbol H and atomic number 1.

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Icosahedron

In geometry, an icosahedron is a polyhedron with 20 faces.

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Liquid

A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a nearly constant volume independent of pressure.

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Lithium

Lithium is a chemical element; it has symbol Li and atomic number 3.

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Melting point

The melting point (or, rarely, liquefaction point) of a substance is the temperature at which it changes state from solid to liquid.

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Molecule

A molecule is a group of two or more atoms held together by attractive forces known as chemical bonds; depending on context, the term may or may not include ions which satisfy this criterion.

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NASA

The National Aeronautics and Space Administration (NASA) is an independent agency of the U.S. federal government responsible for the civil space program, aeronautics research, and space research.

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Nucleophile

In chemistry, a nucleophile is a chemical species that forms bonds by donating an electron pair.

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Organism

An organism is defined in a medical dictionary as any living thing that functions as an individual.

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Oxygen

Oxygen is a chemical element; it has symbol O and atomic number 8.

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Plato

Plato (Greek: Πλάτων), born Aristocles (Ἀριστοκλῆς; – 348 BC), was an ancient Greek philosopher of the Classical period who is considered a foundational thinker in Western philosophy and an innovator of the written dialogue and dialectic forms.

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Potassium

Potassium is a chemical element; it has symbol K (from Neo-Latin kalium) and atomic number19.

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Protein

Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues.

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Seawater

Seawater, or sea water, is water from a sea or ocean.

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Silicon

Silicon is a chemical element; it has symbol Si and atomic number 14.

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Sodium

Sodium is a chemical element; it has symbol Na (from Neo-Latin natrium) and atomic number 11.

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Solar System

The Solar SystemCapitalization of the name varies.

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Solid

Solid is one of the four fundamental states of matter along with liquid, gas, and plasma.

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Standard enthalpy of formation

In chemistry and thermodynamics, the standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy during the formation of 1 mole of the substance from its constituent elements in their reference state, with all substances in their standard states.

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Standard temperature and pressure

Standard temperature and pressure (STP) or Standard conditions for temperature and pressure are various standard sets of conditions for experimental measurements used to allow comparisons to be made between different sets of data.

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State of matter

In physics, a state of matter is one of the distinct forms in which matter can exist.

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The New York Times

The New York Times (NYT) is an American daily newspaper based in New York City.

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Water (classical element)

Water is one of the classical elements in ancient Greek philosophy along with air, earth and fire, in the Asian Indian system Panchamahabhuta, and in the Chinese cosmological and physiological system Wu Xing.

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