When a covalent or an ionic bond is formed a chemical change has

there is a chemical reaction because the ionic bond means that the ions are sharing electrons in a covalent bond there has been 2 non metals (or more) sharing pairs of electrons.

It has formed something new unlike a physical change.

The chemical properties of the substances produced by the reaction are different from those of the reacting substances.

for points guys

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.