Law of Conservation of Mass Vocabulary Test

the basic unit of matter (smallest particle of an element)

anything that has mass and takes up space

the amount of matter in an object

a substance made of only one type of atom that cannot be broken down into simpler substances

a force of attraction that hold atoms together in a molecule

Matter is neither created nor destroyed during a chemical reaction; atoms are only rearranged

to save or hold; start and end with the same amount

a substance made up of atoms of two or more different elements chemically combined

a group of atoms bonded together

the process by which one or more substances change to produce one or more different substances

a representation of a chemical reaction the uses symbols to show the relationship between reactants and products

a combination of chemical symbols (letters) and numbers to represent a substance; tells us the type and number of elements in the substance

one or two letters that represent an element; sometimes derived from Greek or Latin words

an equation where the number of atoms on the left side equals the number of atoms on the right side of the equation

a substance that changes the rate of a chemical reaction or speeds up the reaction

a substance that is formed as the result of a chemical reaction

starting substance in a chemical reaction that reacts with another

small number to the right of chemical symbols that tells the number of atoms of that element

big number in front of a chemical formula identifying the number of molecules