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Dictionary and web definition of a binary is: However, in this web book we use a slightly different, tighter and local — within Chemogenesis — definition: F rom the Wikipedia: Polymorphism can potentially be found in any crystalline material including polymers, minerals, and metals, and is related to allotropy, which refers to elemental solids. Together with polymorphism the complete morphology of a material is described by other variables such as crystal habit, amorphous fraction or crystallographic defects.
The chemistry of a solid substance can be strongly influenced by the particle size. The idea of chemical substance, of physical chemical stuffholds a special place in chemistry. I t transpires that the term 'substance' can have — in this author's opinion, at least — at least three rather different meanings: OK, I can imagine a reader thinking: Is this of any importance???
The problem is that teachers of chemistry and authors of chemistry textbooks, this author included, tend to talk about chemical substances in different ways in different situations. Crucial to the abstract-real-specific what does the term binary mean in chemistry logic is whether the stuff in question is homogeneous or heterogeneous— whether it is a single phase or has phase boundaries.
Chemists love their chemical stuff to be homogeneous: Consider diamondthe well known allotrope of carbon. So the abstract diamondthe allotrope of carbon, notion of diamond is rather different to the notion of real diamondthe synthetic grit used for hardening machine parts or a bag of small colour and sized matched gem stones used by jewelers, and this is rather different to the large specific diamondsof extraordinary value with individual names.
A s discussed elsewhere in this web bookchemists may attempt the synthesis of a chemical that cannot be made in principle. Such a synthetic target can only be abstract. It is thought hydrogen forms a metallic phase at high pressure, but until proved conclusively the notion of metallic hydrogen is abstract.
Ions are abstract entities. Sodium chloride exists, but the sodium ion and chloride ion are imagined. The aluminium ion in water may be represent as: I quickly learned while doing my Ph.
If a proposed reaction fails in the research lab, is it because the reaction scheme is flawed or because the experiment was poorly executed? Is the abstract chemistry wrong or is the real chemistry wrong????? When I first started to develop this project I naively assumed that there would be one entry per chemicalbut this soon proved impossible. Queries, Suggestions, Bugs, Errors, Typos Queries Comments Suggestions Suggestions for links Bug, typo or grammatical error reports about this page.
Leach, the author, using mrl meta-synthesis. This free, open access web book is an ongoing project and your input is appreciated. Definition of Binary Compound Dictionary and web definition of a binary is: We are interested in the sub-set of binary compounds that are: Many binary compounds fail our strict one-type-of-strong-chemical-bond requirement.
For example, there are literally thousands of hydrocarbons substances consisting of hydrogen and carbon only including: But only methylene, CH 2and methane, CH 4possess only one type of strong chemical bond and what does the term binary mean in chemistry the only substances to be considered binaries, here. WaterH—O—H, only has hydrogen-to-oxygen bonds, whereas hydrogen peroxideH—O—O—H, has hydrogen-to-oxygen and oxygen-to-oxygen bonds.
The chemical elements as material substances are here — within the Chemogenesis web book — considered to be special case binaries where the two elements are identical: This definition also holds with bulk elemental materials: If I decided to use lithium aluminium hydride, for example, I would think about abstract, idealised LiAlH 4 and add it to my idealised reaction flask.
The reality would not be so simple. The procedure would be dominated by the fact that what does the term binary mean in chemistry aluminium hydride is a low density dust that can be spontaneously inflammable in air and is rapidly destroyed by moisture. I visualise LiAlH 4 -the-abstract-substance We teach students how to do titration calculations in class, but in the lab they are confronted with glassware, running taps and water getting everywhere!
The useful chemical reagent boraneBH 3actually does not exist under usual lab conditions. Chemists use diboraneB 2 H 6or borane complexed with tetrahydrofuranBH 3: They react chemically as if they were BH 3. Carbon is a particular problem in the Chemical Thesaurus reaction chemistry database. What exactly do I mean by carbon?
The Periodic Table, What does the term binary mean in chemistry is it Showing? Consider the substance morphine. Does this refer to: Check out Aldrich or any of the major chemical catalogs and see that there are multiple entries for all what does the term binary mean in chemistry the common chemical substances.
What is going on? Database of Periodic Tables.