Chemistry

3. an organization of the elements based on chemical properties
4. The number of protons plus the number of neutrons in an atom.
7. a type of matter defined by a unique particle.
10. A subatomic particle with no charge, they are in the nucleus of the atom and they give the atom weight, too many or too few make the atom unstable.
12. a representation of an element using one or two letters.
13. the name chemists use for a substance, which contains the names of the elements in that substance.
14. the name of a substance based on everyday language, such as baking soda or rubbing alcohol.

1. a process during which the atoms of starting substances (reactants) rearrange to form new substances (products) .
2. anything that has mass and takes up space.
5. The number of protons in an atom.
6. A positively charged subatomic particle. They define the atom and are in the nucleus of an atom.
8. a code that represents the number and kinds of atoms in one particle of a substance.
9. a fundamental substance that cannot be broken into simpler substances by chemical or physical processes
11. A negatively charged subatomic particle. They can leave an atom or be given to another atom, their movement is what makes matter reactive.