Matter

3. a subatomic particle found in the nucleus of every atom except that of simple hydrogen
4. one of the basic substances that are made of atoms of only one kind and that cannot be separated by ordinary chemical means into simpler substances.
7. a particle of matter that uniquely defines a chemical substance
9. an negatively charged subatomic particle that can be either bound to an atom or free
11. When two or more elements chemically combine in a fixed ratio by mass, the obtained product is known as a compound
13. a form of matter in which many of the electrons wander around freely among the nuclei of the atom
14. Something that has a defined shape but no defined volume
16. thepositively charged central region of an atom, composed of one or more protons and (for all atoms except hydrogen) one or more neutrons, containing most of the mass of the atom.

1. a physical combination of two or more substances that aren't chemically joined
2. a subatomic particle found in the nucleus of every atom
5. Something that takes up space and has mass.
6. a substance from which something is made or can be made.
8. two or more atoms connected by chemical bonds, which form the smallest unit of a substance that retains the composition and properties of that substance
10. Something that has no defined shape and volume
12. the measure of the amount of matter in a body.
15. Something that has a defined volume but no defined shape