BredNest

Electronegativity is a measure of the tendency of an atom to attract a shared pair of electrons towards itself. Elements Na Mg Al SI P S Cl Ar Electronegativity 0.93 1.13 1.81 2.02 2.19 2.58 3.16 - Note that EN of Ar is not included. Electronegativity is related to the tendency of an atom to attract the shared pair to attract the shared pair of electrons. Since Argon does not form covalent bonds, you obviously cannot assign it an electronegativity value. Moving from one elements to the next across the period, nuclear charge increases by 1 unit and one electron is added to the outer shell. As the positive charge on the nucleus rises, the atom has increasing electron attracting power and therefore an increasing electronegativity.

The mechanical properties of a material are those properties that involve a reaction to an applied load. The mechanical properties of metal determine the range of usefulness of a material and establish the service life that can be expected. Mechanical properties also used to help classify and identify material. The most common properties considered are: Strength The general ability of a material to withstand an applied force. Hardness Hardness is a measure of how easily a material can be scratched or indented. Hard materials are often also very brittle – this means they have a low resistance to impact. Well Known hard materials include diamond and hardened high carbon steels. Brittleness A material that has tendency to break easily or suddenly without any extension first. Good examples are Cast iron, Concrete, High carbon steels, Ceramics, and some polymers such as Urea formaldehyde (UF). Toughness A material that absorbs impact (sudden forces