conversion of mass

• in a chemical reaction, no atoms can be made or destroyed. chemical reactions just change how the atoms are bonded together. doing this creates new substances.
• atoms are the smallest particles of an element that can take part in a chemical reaction. during a chemical reaction, no particles are created or destroyed: the atoms are simply rearranged from the reactants to products. the products may have different properties to the reactants.
• mass is never lost or gained in chemical reactions. we say that mass is always conserved. in other words, the total mass of products at the end of the reaction is equal to the total mass of reactants at the start of the reaction.
• mass is neither created nor destroyed in ordinary chemical and physical changes.
• you must start and end with the same amount when doing an experiment
• rearrangement of matter.

  matter does not turn into or appear from energy. particles are rearranged to create substances different from the original