For example, the stability and low energy of the electron cloud state in helium accounts for the element's chemical inertness, and also the lack of interaction of helium atoms with each other, producing the lowest melting and boiling points of all the elements.

Its usable temperature range up to 350 ° C and chemical inertness make it a useful additive in special greases.

Its relative rarity on Earth, like that of helium, is due to its relative lightness, high vapor pressure at very low temperatures, and chemical inertness, all properties which tend to keep it from being trapped in the condensing gas and dust clouds which resulted in the formation of smaller and warmer solid planets like Earth.

Of the two, technetium more closely resembles rhenium, particularly in its chemical inertness and tendency to form covalent bonds.

Because of its conductive properties and relative chemical inertness, tungsten is also used in electrodes, and in the emitter tips in electron-beam instruments that use field emission guns, such as electron microscopes.

Due to its thermal stability and chemical inertness, slate has been used for laboratory bench tops and for billiard table tops.

Certain ceramic materials have low density, chemical inertness, high strength, hardness and temperature capability ; nanocrystalline ceramics have even greater strength and higher superplasticity.

Neoprene's chemical inertness makes it well suited for industrial applications such as gaskets, hoses, and corrosion-resistant coatings.

Its physical and chemical properties, including but not limited to its inertness and biocompatibility, melting point, ductility and malleability, afford it an important role in the field of endodontics.

Slides may have special coatings applied by the manufacturer, e. g. for chemical inertness or enhanced cell adhesion.

These gaskets can fill many chemical requirements based on the inertness of the material used and fit many budgetary restraints.

For example, the stability and low energy of the electron cloud state in helium accounts for the element's chemical inertness ( the most extreme of all the elements ), and also the lack of interaction of helium atoms with each other ( producing the lowest melting and boiling points of all the elements ).

Molding sands, also known as foundry sands, are defined by eight characteristics: refractoriness, chemical inertness, permeability, surface finish, cohesiveness, flowability, collapsibility, and availability / cost.

It is made using platinum because of its linear resistance-temperature relationship and its chemical inertness.

Later, lead became the material of choice for sinkers due to its low cost, ease of production and casting, chemical inertness ( resistance to corrosion ), and density.

Niobium has physical and chemical properties similar to those of the element tantalum, and the two are therefore difficult to distinguish.

The search for element 93 in minerals was encumbered by the fact that the predictions on the chemical properties of element 93 were based on a periodic table which lacked the actinide series, and therefore placed thorium below hafnium, protactinium below tantalum, and uranium below tungsten.

For a long time chemists searched for eka-tantalum as an element with similar chemical properties as tantalum, making a discovery of protactinium nearly impossible.

The chemical element tantalum ( symbol Ta, atomic number 73 ) is named after the mythological Tantalus ; its lack of reactivity, and the resulting difficulty in isolating the pure metal from ore, gave the element its name, by analogy ; the pure metal tantalized chemists.

The mineral group tantalite, manganese | Mn ) Tantalum | Ta < sub > 2 </ sub > oxygen | O < sub > 6 </ sub > is the primary source of the chemical element tantalum.

In 1846 he rediscovered the chemical element niobium, proving conclusively that it was different from tantalum.

Metal diaphragms of stainless steel ( several grades ), Carpenter 20, Hastelloy, Monel, Inconel, tantalum, titanium and several other metals are in common use where high pressure ratings and specific chemical compatibility are required.

The tantalum sponge then comes into direct contact with the manganese dioxide, and increased leakage current causes localized heating ; usually, this drives an endothermic chemical reaction that produces manganese ( III ) oxide and regenerates ( self-heals ) the tantalum oxide dielectric layer.

The close similarity of physical and chemical properties of actinium and lanthanum makes separation of actinium from the ore impractical.

Its chemical composition makes it difficult to match the amber to its producers – it is most similar to the resins produced by flowering plants ; however, there are no flowering plant fossils until the Cretaceous, and they were not common until the Upper Cretaceous.

However, not all substances or chemical compounds consist of discrete molecules, and indeed most of the solid substances that makes up the solid crust, mantle, and core of the Earth are chemical compounds without molecules.

However, the soda makes the glass water soluble, which is usually undesirable, so lime ( calcium oxide, generally obtained from limestone ), some magnesium oxide ( MgO ) and aluminium oxide ( Al < sub > 2 </ sub > O < sub > 3 </ sub >) are added to provide for a better chemical durability.

The chemical properties of hafnium and zirconium are nearly identical, which makes the two difficult to separate.

This property makes it an ideal metal for chemical reaction vessels and pipes for corrosive liquids.

They say that this chemical quirk actually makes the question of which came first even more pointless than before.

While in general chemical elements can be purified through chemical processes, isotopes of the same element have nearly identical chemical properties, which makes this type of separation impractical, except for separation of deuterium.

This is because the chemical nature of the substance makes it easy to penetrate into the brain, and it also influences the phospholipid bilayer of neurons.

The difficulty of teasing out the effects of any supposed biophotons amid the other numerous chemical interactions between cells makes it difficult to devise a testable hypothesis.

The exposed areas are sensitized in a chemical bath, usually containing palladium and similar to that used for through hole plating which makes the exposed area capable of bonding metal ions.

The ability to produce Chemical State information from the topmost 1-12 nm of any surface makes XPS a unique and invaluable tool for understanding the chemistry of any surface either, as received, or after physical or chemical treatment ( s ).

Considered a very strong spice due to the eugenol chemical that makes up most of the clove's taste ( 85 percent ), the quantity of clove used in recipes is usually small.

Without a chiral influence ( for example a chiral catalyst, solvent or starting material ), a chemical reaction that makes a chiral product will always yield a racemate.

Presence of gypsum powder near a crime scene makes finger-printing impossible due to its chemical properties.

The ability to determine transition temperatures and enthalpies makes DSC a valuable tool in producing phase diagrams for various chemical systems.

The characteristic that makes BZ an incapacitating rather than a toxic chemical warfare agent is its high safety margin ( ICt < sub > 50 </ sub >/ LCt < sub > 50 </ sub >) of around 40-fold ( range 32 to 384 fold ).

* How Stradivari and Guarneri got their music discusses the chemical techniques used to figure out what makes these instruments ' unique sound.

The alkali nature of sodium bicarbonate makes it the only dry chemical agent, besides Purple-K, that was used in large-scale fire suppression systems installed in commercial kitchens.

However, the increased surface area makes them much more susceptible to chemical attack.

It is the hydroxyl group which makes castor oil and ricinoleic acid valuable as chemical feedstocks.