Definitions

1. Chemically, the precious metals are less reactive than most elements, have high luster, and have higher melting points than other metals. (Web site)
2. Chemically, a mineral must be of unvarying composition, a stipulation that effectively limits minerals to elements and compounds.
3. Chemically, the element 110 is in the same Group as nickel, palladium, and platinum (Group 10). (Web site)
4. Chemically, the Earth can be divided into the crust, mantle, outer core, and inner core. (Web site)
5. Chemically, the reactivity of a methyl group depends partially on what it is attached to.

Valence Electrons

1. Atoms with a complete shell of valence electrons (corresponding to an electron configuration s 2 p 6) tend to be chemically inert.

Residual Hydrazide Groups

1. But residual hydrazide groups are not desired, as such groups are neither thermically nor chemically as stable as oxazole groups. (Web site)

Anticonvulsant

1. Chemically, topiramate is a sulfamate -substituted monosaccharide, related to fructose, a rather unusual chemical structure for an anticonvulsant. (Web site)

Felbamate

1. Felbamate is chemically related to meprobamate (381,382), an anxiolytic drug (383), both being propanediol dicarbamates (Figure6). (Web site)

Aeds

1. This discussion is limited to chemically mediated aplastic anemia induced by antiepileptic drugs (AEDs). (Web site)

Lanthanides

1. Yttrium is a silver-metallic, lustrous rare earth metal that is relatively stable in air and chemically resembles the lanthanides. (Web site)
2. Notable Characteristics Yttrium is a silver-metallic, lustrous rare earth metal that is relatively stable in air and chemically resembles the lanthanides. (Web site)

Chert

1. In addition to detrital quartz, free silica can be chemically precipitated as opal, chalcedony and chert. (Web site)

Extremely Active Chemically

1. Oxygen is extremely active chemically, forming compounds with almost all of the elements except the inert gases. (Web site)

Certain Elements

1. There also exist chemically peculiar stars that show unusual abundances of certain elements in their spectrum; especially chromium and rare earth elements.

Sulfides

1. Sulfides are chemically more reactive than ethers, reflecting the greater nucleophilicity of sulfur relative to oxygen. (Web site)

Cornbread

1. Cornbread is unique because it is leavened (caused to rise) chemically, instead of through the use of yeast or other leavening agents.

Chemically Similar Sodium

1. Nevertheless, it is less reactive than the chemically similar sodium. (Web site)

Chemically Resistant

1. Chrysotile is also chemically resistant and has been used to make laboratory bench tops that prevent chemical stains.

Fed Green

1. In studies of liver, skin, and stomach cancer, chemically induced tumors were shown to decrease in size in mice that were fed green and black tea (2,3).

Transition Metal

1. Chemically, gold is a transition metal and can form trivalent and univalent cations in solutions. (Web site)
2. It is a rare silver white transition metal of the platinum group, resembling platinum chemically.

Levofloxacin

1. Chemically, levofloxacin is the S-enantiomer (L-isomer) of ofloxacin.

Chemically Broken

1. Hydrolyzed proteins, used by the food industry to enhance flavor, are simply proteins that have been chemically broken apart into amino acids. (Web site)

Noble Gases

1. Like the other noble gases, krypton is chemically unreactive. (Web site)

Valence

1. Compounds Helium is chemically unreactive under all normal conditions due to its valence of zero.

Bread Leavened Chemically

1. Cornbread is a generic name for any number of quick breads (a bread leavened chemically, rather than by yeast) containing cornmeal.

Augite

1. Augite is a mafic mineral described chemically as (Ca, Na)(Mg, Fe, Al)(Al, Si) 2 O 6 or calcium sodium magnesium iron aluminium silicate. (Web site)

Outer Valence Shells

1. Atoms tend to chemically react with each other in a manner that will fill (or empty) their outer valence shells. (Web site)
2. Atoms tend to chemically react with each other in a manner that will fill (or empty) their outer valence shells.[78] For other uses, see Valence. (Web site)

Chemically Sensitive

1. Marble—any crystallized carbonate rock—is softer and more chemically sensitive, so it will show wear sooner than granite.
2. The alcohol can be monofunctional and selected from the family of substances that are chemically sensitive. (Web site)

Identical Chemically

1. In contrast Nano mHAP, supplied in the form of nanocrystals, is a calcium phosphate almost identical chemically to the hydroxyapatite of our teeth.

Calcium Magnesium Iron Silicate

1. Augite is a single chain inosilicate mineral described chemically as (Ca,Mg,Fe)SiO 3 or calcium magnesium iron silicate.

Mechanically

1. However, when injured (either mechanically, chemically or biologically), it can profoundly promote hemostasis. (Web site)

Related Chemically

1. Dependence: Phendimetrazine Tartrate is related chemically and pharmacologically to the amphetamines.

Similar Chemically

1. In this sense, alcohols are a chemical substance; they are similar chemically, but not identical to, the depressant of the same name (alcoholic beverages).

Chemically Different

1. Using the atoms at the tip (that are chemically different to those at the surface) as �ink�, it is possible to �write� or �draw� with the microscope. (Web site)

Chemically Bond

1. The role of hydrogen and oxygen, which chemically bond to form water, is discussed in the context of the hydrosphere (see Hydrologic Cycle). (Web site)

Chemically Active

1. Iodine is a grayish black solid and is the least chemically active of the four; however, among the nonmetals only oxygen is more reactive than iodine. (Web site)
2. Because it is the least chemically active of all metals, gold usually occurs in the free or uncombined state.
3. In general, the fewer electrons an element must lose, gain, or share to reach a stable shell structure, the more chemically active the element is. (Web site)

Chemically Modified

1. Copolymerized acrylonitrile is likewise chemically modified in the hydrolysis, for example converted into amide groups or carboxyl groups.

Chemically Combined

1. Chelated calcium refers to the way in which calcium is chemically combined with another substance. (Web site)
2. Halogens are a special group of elements that usually have a charge of negative one when chemically combined. (Web site)
3. About 98.5% of the oxygen in a sample of arterial blood in a healthy human breathing air at normal pressure is chemically combined with the Hb. (Web site)

Chemically Identical

1. The segments could be chemically identical, which would make such a molecule a homopolymer. (Web site)

Chemically Distinct

1. Valproic acid is chemically distinct from other AEDs. (Web site)
2. However, the presence of water from the subducted lithosphere results in magmas that are chemically distinct from those produced at mid-ocean ridges.

Chemically Similar

1. The soft, bluish-white metal is chemically similar to the two other metals in group 12, zinc and mercury. (Web site)
2. Trace amines are endogenous amine compounds that are chemically similar to classic biogenic amines like dopamine, norepinephrine, serotonin, and histamine. (Web site)
3. Zinc is, in some respects, chemically similar to magnesium, because its ion is of similar size and its only common oxidation state is +2.

Glucose

1. Glucose chemically attaches to proteins and nucleic acids without the aid of enzymes, increasing the formation of AGEs (4). (Web site)
2. Complex sugars consumed by the organism can be broken down into a less chemically complex sugar molecule called glucose. (Web site)

Hydroxyl Groups

1. Polyacrylamide appears to be chemically inert, while the hydroxyl groups of agarose may participate in transient H-bonding during migration. (Web site)

Ketones

1. Ketones are related to the aldehydes but are less active chemically. (Web site)

Feldspar

1. Leucite belongs to a group of minerals that are chemically similar to feldspar. (Web site)
2. Nepheline occurs in various volcanic rocks and is chemically related to feldspar. (Web site)

Quartz

1. Rhyolite - a fine grained to glassy rock containing crystals of quartz, feldspar, and biotite - chemically the same as a granite. (Web site)
2. It is very closely related to quartz, agate, chalcedony and carnelian, which are chemically identical, but were formed under different conditions.
3. Both forsterite and leucite are chemically incompatible with quartz. (Web site)

Filtration

1. Dry-laid, needlepunch and chemically bonded nonwovens for automotive, medical and filtration applications, from a variety of man-made fibers. (Web site)

Amino

1. The amino acid was isolated from wheat gluten in 1866 and chemically synthesized in 1890. (Web site)
2. In addition, amino acid side chains of fragments of the protein of the invention can be chemically modified. (Web site)

Sugars

1. The body cannot tell the difference between naturally occurring and added sugars because they are identical chemically. (Web site)

High Temperatures

1. They are stable at high temperatures and pressures and may remain chemically unchanged during the metamorphic process. (Web site)

Heated

1. Psilocybin is chemically far more stable than psilocin, the latter compound being largely lost when the mushroom is heated or dried. (Web site)
2. Saccharin is unstable when heated but it does not react chemically with other food ingredients. (Web site)
3. Calcium is chemically active; it tarnishes rapidly when exposed to air and burns with a bright yellow-red flame when heated, mainly forming the nitride. (Web site)

Categories

1. Reactive
2. Nature > Natural Resources > Minerals > Metals
3. Elements
4. Substances
5. Encyclopedia of Keywords > Nature > Chemistry > Inert

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