When the plastic strip is rubbed on the skin, electrons from the skin are transferred to the plastic giving the plastic a negative charge. When the plastic is moved near the desk, electrons in the ...

In organic molecules, an exciton is a particle bound pair of an electron (negative charge) and its hole (positive charge). They are held together by Coulombic attraction and can move within ...

Normally, the positive and negative charges cancel out because there are the same number of each. So the atom has no overall charge - it is neutral. But when you rub one, neutral, electrically ...

Soils are composed of a mixture of sand, silt, clay and organic matter. Both the clay and organic matter particles have a net negative charge. Thus, these negatively-charged soil particles will ...

When two objects have the same static charge, they move away or repel one another. Rubbing a balloon on hair causes electrons to move from your hair onto the balloon, giving the balloon a negative ...