أكاديميا - كولنز - معاجم الجيب العلمية - الكيمياء - انكليزي - فرنسي - عربي الحرف ٢_ t

Academia - Collins - Pocket Scientific Dictionaries - Chemistry - English - French - Arabic Letter 2_ T


thermoplastic
thermoplastique

Thermally plasticized. A thermoplastic ionomer polymer becomes soft when heated and can be shaped and reshaped into new shapes. Examples include: nylon and poly(chloroethene).


thermosetting
thermodurcissable

Thermally hardened. A thermoset polymer is an ionomer that does not become soft again after being heated. If it is heated again, it disintegrates. Examples include:
Bakelite and Formica.


tin
It contains m

tin. A metal in group IV of the periodic table. It is found in allotropes, the most common of which are gray tin and white tin. Gray tin is a stable metal at low temperatures. The data shown in the figure below relates to white tin, which is a shiny metal with normal metallic reactions that occurs naturally in the form of SnO2 oxide.

Tin is used in making tin plates (steel sheets covered with a very thin layer of tin), bronze, welding, and bearing alloys. It is also used in making glass, where the glass floats on the surface of molten tin, and in this way large areas of glass are formed without distortions. Tin sheets are used to make metal containers to preserve food
.

titanium
titanium m

Titanium is a transition metal commonly found in the Earth's crust (0.5%). Titanium forms very strong alloys while its density is low. Its mixtures are used in the aviation industry. It is resistant to corrosion even at high temperatures. Titanium oxide TiO2 is used as a pigment.


titration
titration f

Calibrating the reaction of two solutions, used in analysis to discover the concentration of one of them. A precisely measured volume of one solution is usually placed in a conical flask while the other solution is placed in a burette. The burette converter is added slowly until the other solution is completely consumed, which is shown by using an indicator, a pH meter, or a conductivity meter. This technique is most often used in acid-base reactions.
See volumetric analysis.

A burette containing a solution of known volume and unknown concentration

buckle
faucet

A conical flask contains a solution of known volume. And its focus

tonne
tone of metric

ton unit unit mass. A ton equals 1000 kilograms. A ton is also equal to 2205 lbs, which is 35 lbs lighter than the imperial ton (2240 ​​lbs). The ton (sometimes called a metric tonne) is a widely used measurement today.


transition metals
Elements of transition

Transition metals. Elements are found in the middle section of the periodic table. There are three series of these elements, the most important of which are those found between scandium and zinc. Transition metals have similar properties:
⏺Produces colored compounds.
⏺With variable valency.
⏺Solids with high melting and boiling points.
⏺Useful as catalysts.
⏺It has stalactites that are useful as media.

They are important elements that are used as metals, such as iron, copper, silver, gold, mercury, zinc, and platinum, or used in alloys, such as titanium, canadium, chromium, manganese, cobalt, nickel, and tungsten.


transition temperature
Temperature f de transition

Transition temperature. The temperature above which one of the allotropes is stable and below which another allotrope is stable. These are some examples:

Rhombic sulfur is settled underneath
96 AD
Monoclinic sulfur is settled on top of it

Gray tin settled underneath
°13m
White tin rests on top of it


trichloromethane
trichloromethane m

Trichloromethane. This molecule is also known as chloroform and is used in anesthesia. Trichloromethane is a substituted alkane, which is a colorless, volatile liquid that boils at a temperature of 62°C.
See tetrachloromethane.

CHCl3

triple bond
liaison f double

Triple bond. A triple bond contains three shared pairs of electrons and is found in alkynes and in hydrogen-containing compounds.
Examples:

Etain H - C = C - H
Azot = N