classes ::: Chemistry,
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object:Chemistry (cool facts)
class:Chemistry

--- UNSORTED
3. Water expands when freezes, unlike other substances
Air becomes liquid at -190C

--- HYDROGEN
Hydrogen is the first element in the periodic table. It is the simplest possible atom composed of one proton in the nucleus which is orbited by a single electron. Hydrogen is the lightest of the elements and is the most abundant element in the universe.
Every hydrogen atom in your body is likely 13.5 billion years old because they were created at the birth of the universe
  Scientists estimate that Hydrogen makes up over 90 percent of all the atoms in the universe.
  It is the only element that can exist without neutrons.
  Hydrogen becomes a liquid at very low temperature and high pressure. Under extremely high pressure it can become a liquid metal. It is thought that metallic hydrogen exists at the cores of gas giant planets like Jupiter.
  Around 10 percent of the mass of the human body is hydrogen.
  Because it is so light, it was once used in lighter-than-air-balloons. However, it became too dangerous because of its highly flammable nature.
  Hydrogen gas can be produced in a lab by combining a dilute acid with a metal.

--- HELIUM
Helium is the second lightest and second most common element in the universe. It is at the top of the noble gas group in the periodic table.
At room temperature helium is an odorless, tasteless, colorless gas. It has very low boiling and melting points, meaning that it is generally found in the gas phase except under the most extreme of conditions. Helium is the only element that does not solidify under ordinary pressures and remains a liquid even at absolute zero.
Helium is constantly being produced at the internal cores of stars. Deep inside a star, intense pressures cause hydrogen atoms to convert into helium atoms. This creates the energy, heat, and light that powers the stars and the sun. This conversion is called nuclear fusion.
Helium has never been observed by scientists to bond with another element to form a compound.

--- LITHIUM
Along with hydrogen and helium, lithium was one of the three elements produced in large quantities by the Big Bang.

--- CARBON
Carbon is one of the most important elements to life on planet Earth. It forms more compounds than any other element and forms the basis to all plant and animal life. Carbon is the fourth most abundant element in the universe by mass and the second most abundant element in the human body.
One of the key characteristics of carbon is its ability to make long chains of molecules through linking up with other carbon atoms. Carbon also has the highest melting point of all the elements.
It is known to form nearly 10 million different compounds.
Carbon is the fourth most abundant element in the universe and typically the fourth most abundant element in stars.

--- OXYGEN
Oxygen is an important element that is needed by most life forms on Earth to survive. It is the third most abundant element in the universe and the most abundant element in the human body. Oxygen has 8 electrons and 8 protons. It is located at the top of column 16 in the periodic table.
The oxygen that is found in the air is produced by photosyn thesis. Without plants, there would be very little oxygen in the air.

--- SODIUM
Sodium is the sixth most abundant element on Earth. It is never found in its pure form because it is so reactive. It is only found in compounds such as sodium chloride (NaCL) or table salt. Sodium chloride is found in ocean water (salt water), salt lakes, and underground deposits. Pure sodium can be recovered from sodium chloride through electrolysis.

--- IRON
Iron is the most abundant element in the Earth. The Earth's core is mostly made up of an iron-nickel alloy. Iron also makes up about 5% of the Earth's crust where it is the fourth most abundant element.
Iron is mentioned in the Book of Genesis in the Bible.

--- RESOURCES
https://www.ducksters.com/science/chemistry/

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now begins generated list of local instances, definitions, quotes, instances in chapters, wordnet info if available and instances among weblinks


OBJECT INSTANCES [0] - TOPICS - AUTHORS - BOOKS - CHAPTERS - CLASSES - SEE ALSO - SIMILAR TITLES

TOPICS
SEE ALSO


AUTH

BOOKS

IN CHAPTERS TITLE

IN CHAPTERS CLASSNAME

IN CHAPTERS TEXT

PRIMARY CLASS

Chemistry
SIMILAR TITLES
Chemistry (cool facts)

DEFINITIONS


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WORDNET



--- Overview of noun chemistry_

The noun chemistry has 3 senses (first 1 from tagged texts)
                  
1. (5) chemistry, chemical science ::: (the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions)
2. chemistry ::: (the chemical composition and properties of a substance or object; "the chemistry of soil")
3. chemistry, interpersonal chemistry, alchemy ::: (the way two individuals relate to each other; "their chemistry was wrong from the beginning ::: they hated each other"; "a mysterious alchemy brought them together")


--- Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun chemistry_

3 senses of chemistry                        

Sense 1
chemistry, chemical science
   => natural science
     => science, scientific discipline
       => discipline, subject, subject area, subject field, field, field of study, study, bailiwick
         => knowledge domain, knowledge base, domain
           => content, cognitive content, mental object
             => cognition, knowledge, noesis
               => psychological feature
                 => abstraction, abstract entity
                   => entity

Sense 2
chemistry
   => substance
     => matter
       => physical entity
         => entity
     => part, portion, component part, component, constituent
       => relation
         => abstraction, abstract entity
           => entity

Sense 3
chemistry, interpersonal chemistry, alchemy
   => social relation
     => relation
       => abstraction, abstract entity
         => entity


--- Hyponyms of noun chemistry_

1 of 3 senses of chemistry                      

Sense 1
chemistry, chemical science
   => immunochemistry, chemoimmunology
   => organic chemistry
   => inorganic chemistry
   => physical chemistry
   => electrochemistry
   => femtochemistry
   => geochemistry
   => photochemistry
   => radiochemistry, nuclear chemistry
   => surface chemistry
   => thermochemistry


--- Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun chemistry_

3 senses of chemistry                        

Sense 1
chemistry, chemical science
   => natural science

Sense 2
chemistry
   => substance

Sense 3
chemistry, interpersonal chemistry, alchemy
   => social relation




--- Coordinate Terms (sisters) of noun chemistry_

3 senses of chemistry                        

Sense 1
chemistry, chemical science
  -> natural science
   => life science, bioscience
   => chemistry, chemical science
   => physics, natural philosophy
   => physics, physical science
   => earth science
   => cosmography

Sense 2
chemistry
  -> substance
   => body substance
   => protoplasm, living substance
   => chemistry
   => material, stuff
   => phlogiston
   => mixture
   => atom
   => chemical element, element
   => activator
   => substrate
   => element
   => medium
   => medium
   => fluid
   => volatile
   => essence

Sense 3
chemistry, interpersonal chemistry, alchemy
  -> social relation
   => relations, dealings
   => professional relation
   => politics, political relation
   => chemistry, interpersonal chemistry, alchemy




--- Grep of noun chemistry_
chemistry department
chemistry lab
chemistry laboratory



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