properties of earth materials

Polyethylene has a low softening point of 383K and a low specific gravity of 0.22. The material is tough flexible highly insulating water resistin..

Earth as a Source of Elements - Most elements are formed due to fusion of simple nuclei to give heavier nuclei i.e., nucleosynthesis or nuclear fusion reactions taking place in the stars. Atoms of these elements began to fall together about six billion years ago to form a system, presentl..

Due to their low ionization energies all group 2 elements tend to lose their valence electrons and act as strong reducing agents. The decrease of the reduction potential values down the group, indicate an increase of strength as a reducing agent. However the members of this group are weaker reduci..

Neoprene is superior to natural rubber because of the following properties: Neoprene is non-inflammable but natural rubber is inflammable Neoprene is resistant to oils, organic solvents, petrol and grease. Natural rubber swells and rots in contact with these materials N..

The magnetic properties of materials are a consequences of magnetic moments associated will individual electrons. The magnetic moment of an electron is due to its orbital motion and also due to its spin around its own axi..

Introduction - We have learnt that a force changes or tends to change the state of rest, speed or direction of motion of an object, i.e., the force produces an acceleration. In this chapter, we are going to identify one of the forces which produces acceleration in all objects on the surface of the ..

Uses of Sulphur Dioxide - It is a powerful germicide and insecticide and hence it is used a household fumigant. It can bleach delicate fibres. It undergoes easy liquefaction and vaporization and hence it is used as refrigerent in cold storage plants. It is used in the manufacture of sulphuric acid ..

They are deflected by electric and magnetic fields. The deflection is less compared to that of b particles, because a particles are heavy. They affect a photographic plate and cause fluorescence on striking a fluorescent material. They ionise the gas through which they pass. The..

Magnetic Properties of Solids - The magnetic properties of materials are a consequences of magnetic moments associated will individual electrons. The magnetic moment of an electron is due to its orbital motion and also due to its spin around its own axis. A moving elec..

Element Symbol Atomic No. Electronic Configuration Abundance in Earth's crust (in ppm) Helium He 2 1s 2 5.2 x 10 - 4 Neon Ne 10 [He] 2s 2 2p 6 1.8 x 10 - 3 Argon Ar 18 [Ne] 3s 2 3p 6 9.3 x 10 - 1 Krypton Kr 36 [Ar] 3d 10 4..