WHO Melting-Point Reference Substances

Related Experiment Video

Updated: Jun 11, 2026

Simulation of the Planetary Interior Differentiation Processes in the Laboratory
06:04

Simulation of the Planetary Interior Differentiation Processes in the Laboratory

Published on: November 15, 2013

H Bervenmark, N A Diding, B Ohrner

    Bulletin of the World Health Organization
    |July 7, 2010
    PubMed

    More Related Videos

    Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident09:18

    Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident

    Published on: December 14, 2017

    Measuring the Densities of Aqueous Glasses at Cryogenic Temperatures09:50

    Measuring the Densities of Aqueous Glasses at Cryogenic Temperatures

    Published on: June 28, 2017

    Related Concept Videos

    Phase Transitions: Melting and Freezing02:39

    Phase Transitions: Melting and Freezing

    Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
    Bonding in Metals02:32

    Bonding in Metals

    Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
    Comparing Intermolecular Forces: Melting Point, Boiling Point, and Miscibility02:34

    Comparing Intermolecular Forces: Melting Point, Boiling Point, and Miscibility

    Intermolecular forces are attractive forces that exist between molecules. They dictate several bulk properties, such as melting points, boiling points, and solubilities (miscibilities) of substances. Molar mass, molecular shape, and polarity affect the strength of different intermolecular forces, which influence the magnitude of physical properties across a family of molecules.
    Temporary attractive forces like dispersion are present in all molecules, whether they are polar or nonpolar. They...
    Molecular and Ionic Solids02:54

    Molecular and Ionic Solids

    Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
    Molecular Solids
    Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
    Types of Chemical Bonds02:37

    Types of Chemical Bonds

    Chemical bonding theories were pioneered by American chemist Gilbert N. Lewis. He developed a model called the Lewis model to explain the type and formation of different bonds. Chemical bonding is central to chemistry; it explains how atoms or ions bond together to form molecules. It explains why some bonds are strong and others are weak, or why one carbon bonds with two oxygens and not three; why water is H2O and not H4O.
    Phase Changes01:19

    Phase Changes

    Phase transitions play an important theoretical and practical role in the study of heat flow. In melting or fusion, a solid turns into a liquid; the opposite process is freezing. In evaporation, a liquid turns into a gas; the opposite process is condensation.
    A substance melts or freezes at a temperature called its melting point and boils or condenses at its boiling point. These temperatures depend on pressure. High pressure favors the denser form of the substance, so typically, high pressure...