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An instrument for measuring the amount of salt in a solution. Also,"salimeter, salometer."

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xenon tetrafluoride

A colorless, crystalline compound, XeF4, prepared by heating a gaseous mixture of fluorine and xenon.

Periodic Law

The properties of the elements are periodic functions of their atomic numbers.

Colligative Properties

Physical properties of solutions that depend upon the number but not the kind of solute particles present.

Ternary Compound

A compound consisting of three elements, may be ionic or covalent.

Ether

Compound in which an oxygen atom is bonded to two alkyl or two aryl groups, or one alkyl and one aryl group.

Electron

A subatomic particle having a mass of 0.00054858 amu and a charge of 1-.

Zone Refining

A method of purifying a bar of metal by passing it through an induction heater, this causes impurties to move along a melted portion. This method applies the fact when a metal crystallizes on cooling, impurities are automatically expelled as they do not form part of the crystal.

Interesting facts about metals

Metals have been used by people since ancient times. All the time the process of obtaining them was improved, useful alloys of various metals appeared. Let’s look at interesting facts about metals.

Standard Entropy

The absolute entropy of a substance in its standard state at 298 K.

Chemistry of the sky

Chemistry can teach us about the composition of celestial bodies and determine their age.