Cycle 2 Exam Review

1. The process of a substance undergoing a chemical change
5. A way to write compounds so we can see how many of each type of atom are present
7. A positively charged subatomic particle located in the nucleus of an atom
10. The mass of an atom, which is equal to the total number of protons and neutrons
12. A chemical bond between a metal and a non-metal in which one atom “gives” an electron and the other “takes” an electron
14. A negatively-charged subatomic particle located outside of the nucleus
15. A chemical reaction in which 2 substances combine to produce 1 new substance
16. A charged atom with an unequal number of protons and electrons
17. A row on the periodic table
19. A pure substance composed of the same type of atom throughout
20. Electrons in the outermost energy level
22. A column on the periodic table
23. A chemical bond between nonmetals in which electrons are shared

2. The area surrounding the nucleus of an atom
3. The starting substances before the chemical reaction takes place
4. The substances that exist after a chemical reaction takes place
6. Smallest unit of matter, consists of a nucleus and electron cloud
8. A written way to express a chemical reaction
9. A substance made of 2 or more elements bonded together
11. The number of protons in one atom
13. A chemical reaction in which a substance is broken down into 2 or more new substances
18. The positively charged region in the center of an atom
21. A neutrally charged subatomic particle located in the nucleus of an atom