list of hard metals

All metals are hard except sodium and potasium which are soft and can be cut with a knif..

The hardness of metals is due to the strength of the metallic bond. In general, the strength of a metallic bond depends upon: The greater the number of valence electrons for delocalisation the stronger is the metallic bond. Smaller the size of..

All elements except hydrogen, which form positive ions by losing electrons during chemical reactions are called metals. Thus metals are electropositive elements. They are characterized by bright lustre, hardness, ability to resonate sound and are excellent conductors ..

In metallic crystals the constituent particles are positive kernels i.e., nuclei where inner electrons are dispersed in a sea of mobile valence electrons. The forces present between the constituents are metallic bonds. The main characteristics of metallic crystals are..

Summary - An electrolyte is a compound (salt, acid or base), which in solution or in a molten state conducts an electric current and is simultaneously decomposed by it Electrolytes are ionised into electrically charged ions, which carry the current Charged ions move towards the oppositely charged e..

="tblcel">Their densities are usually low. Melting point They usually have a high melting point except mercury, cesium, gallium, tin, lead. Their melting points are low. Boiling point Their boiling points are usually high. Their boiling points are low. Hardness They are usually hardh..

Bonding in Metallic Solids - More than 80 elements in the periodic table are metals. Metals are solids at ordinary temperature and pressure, with the exception (of mercury and gallium). Metals have characteristic properties such as: High thermal and electrica..

The Reactivity Series of Metals - Although most metals are usually electropositive in nature and lose electrons in a chemical reaction they do not react with the same vigour or speed. Metals display different reactions towards different substances. The greater the ease..

. Any atom with this configuration will be in the minimum state of energy, hence stable. Atoms try to attain the octet or the duplet configuration by either loss or gain of electrons. Metal atoms tend to lose electrons. Non metal atoms tend to gain electrons. Example: Lithium ha..

) 44 x 10 -6 Nichrome (alloy of Ni, Cr, Mn and Fe) 100 x 10 -6 Insulators Glass 10 10 - 10 14 Hard rubber 10 13 - 10 16 Ebonite 10 15 - 10 17 Diamond 10 12 - 10 13 Paper (dry) 10 12 Note Good conductors possess low resistiv..