During chemical reactions atoms become bounded (joined) together in new ways.
Magnesium + copper oxide = magnesium Oxide + Copper
Chemical reactions are different to physical changes. In physical changes, atoms remain bounded in the same way before and after a change.
Chemical Changes/ chemical reactions.
In chemical reactions new substances are formed. We call the starting materials reactants and the substances that are formed: products.
During chemical changes (reactions) different atoms become bonded.
Chemical bonds are not easy to break.
Because of this chemical changes are usually difficult to reverse (It is difficult to change product back into reactants) e.g. we cannot “un-burn” magnesium, and we cannot un-bake a cake :)
No comments:
Post a Comment