1.
basic particle of matter; the smallest particle of an element that has the properties of that element
2.
a characteristic of a substance that is observed during a chemical reaction
3.
a process that rearranges chemical bonds forming new substances with different chemical properties
4.
a substance made of two or more elements chemically combined in a specific ratio or proportion; molecules are also compounds
5.
a pure substance that cannot be broken down into other substances by chemical or physical means
6.
a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound
7.
a change that affects the form of a substance but not the chemical makeup
8.
properties that can be observed/measured without changing the chemical makeup of a substance
9.
energy is released from the system into the surroundings; gives off energy as a by-product
10.
a substance formed as a result of a chemical reaction (change)
11.
a chain of molecules made up of repeating units
12.
a substance that enters into a chemical reaction (change)
13.
basic particle of matter; the smallest particle of an element that
14.
energy is absorbed into the system from the surroundings; requires energy in order to be completed
15.
matter cannot be created or destroyed in an isolated system
