1.
Anything that has mass and takes up space
3.
The particle located in the nucleus of an atom that has no charge
4.
When two or more DIFFERENT elements come together to create a new substance
5.
A characteristic of a substance
6.
A characteristic that can only be determined by changing the identity of a substance
7.
the negative particle of an atom that circles around the nucleus
8.
the center of an atom that contains protons and neutrons
10.
this is how atoms combine to form molecules
11.
The positively charged particle located in the nucleus
12.
A characteristic that can be observed or measured without changing the identity of the substance
13.
the smallest particle of an element that has the properties of that element
15.
A change in which a new substance is formed
16.
Naturally occurring substance that cannot be broken down into simpler substances
18.
A change in which the substance is altered but a new substance is NOT formed
