effect of gravitational field on metals and non metals

. Thus they gain a negative charge equal to the number of electrons gained. Although carbon and silicon have four electrons each in the valence shell, they are included in the non-metals. Boron is an exception; it has three electrons in the outermost shell but is still included among ..

. Although carbon and silicon have four electrons each in the valence shell, they are included in the non-metals. Boron is an exception; it has three electrons in the outermost shell but is still included among non-metals. As we move down the group the number of shells increases..

There are three ways in which electrons eject out of a material. They are (i) Thermionic emission (ii) Field emission (iii) Photo electric emission In all the above cases, energy is given to the material but in different forms. If given in the form of heat it is called as Thermionic emiss..

The fact that chemical changes produce electrical effect was discovered accidentally in 1971, by Luigi Galvani, an Italian professor. He found that an electric current flowed across two dissimilar metals. Volta, professor of natural philosophy successfully reproduced some ..

Metals and Non-metals..

Summary - Electric potential is the condition that determines the flow of charge. Electrical potential at a point in an electric field is defined as the amount of work done in bringing a unit of positive charge from infinity to that point. Electrical potential is a scalar quantity. The po..

Superconductivity - Some materials, including several metals and alloys, exhibit a phenomenon called superconductivity. As the temperature decreases, the resistivity at first decreases smoothly like that of any metal. But then at a certain critical temperature T C , a phase tran..

Earth's crust is rich in inorganic materials . It includes ores, that are used on a large-scale to yield metals such as iron, aluminium, copper, tin, nickel, silver, gold, platinum etc. These minerals are very useful in industrial and technological growth. Some of the metals are..

Minerals - Earth's crust is rich in inorganic materials . It includes ores, that are used on a large-scale to yield metals such as iron, aluminium, copper, tin, nickel, silver, gold, platinum etc. These minerals are very useful in industrial and technological growth. Some of the meta..

Small drops of oil formed by a sprayer are allowed to fall in between a positively charged upper metal plate and a negatively charged lower metal plate. The space between the two plates is irradiated with X-rays. This displaces some electrons of the air molecules, which consequ..