Chase Douthit

3. a number written slightly below and to the right of a chemical symbol that shows how many atoms of the element are in a compound
7. a substance formed by two or more different types of atoms bonding together
8. an atom of an element that has a different number of neutrons than another atom of the same element
10. the total number of protons and neutrons in the nucleus
13. denoting a process involving substances in different phases
14. increases chemical reaction but is not itself consumed in the reaction
15. changes affecting the form of a chemical substance but not its chemical composition
20. a positively charged particle inside the nucleus
21. a group of atoms that are held together by covalent bonds
23. a negatively charged particle outside of the nucleus

1. a combination of two or more substances that do not combine chemically
2. a substance formed by a chemical reaction
4. a solid substance that forms as a result of a chemical reaction
5. a vertical column in the table of elements
6. the number before a chemical formula that indicates how many molecules are involved in a chemical reaction
9. law stating that atoms cannot be created or destroyed in a chemical reaction
11. an atom or group of atoms that have a positive or negative charge
12. a substance that is present at the beginning of a chemical reaction and is changed into a new substance
16. substances and mixtures that are in one single phase
17. occurs when two substances combine to create a new substance
18. the number of protons in the nucleus
19. a particle inside the nucleus that has no charge
20. a horizontal row in the table of elements
22. a substance that cannot be broken down into a simpler substance by ordinary chemical changes