1. Chemistry

2. A type of change involving the nucleus of an atom A. Physical change B. Chemical Change C. Nuclear Change D. A base

3. Digestion of starch in the mouth is a _________ _______ A. Physical change B. Chemical Change C. Nuclear Change D. A base

4. A substance that has more OH- ions than H+ ions is a(an) A. Acid B. Base C. Ion D. Solute

5. Anything that occupies space and has mass A. Weight B. Matter C. Cell D. Physical Change

6. Where are protons and neutrons located? A. Nucleus B. Electron cloud C. Energy levels D. Neutrons

7. The atomic number of Oxygen is 8, which is also the number of A. Protons B. Neutrons C. Electrons D. Both A & B E. Both A & C F. Both B &C

8. Tearing a piece of paper is an example of ________? A. Physical change B. Chemical Change C. Nuclear Change D. A base

9. One Carbon atom has 6 neutrons and another carbon atom has 8 neutrons. The two atoms are A. Compounds B. Isomers C. Isotopes D. ions

10. In covalent bonds, electrons are ……. A. Gained B. Lost C. Shared D. transferred

11. 2 The number of atoms in 15 H 2 O is A. 15 B. 30 C. 45 D. 60

12. 2 The number of molecules in 15 H 2 O is A. 15 B. 30 C. 45 D. 60

13. The energy required to start a chemical reaction is called A. Activation energy B. Potential energy C. Kinetic energy D. Inherent energy

14. Which of the following structures represents a diatomic molecule A. NaCl B. H-O C. H- C=C-H D. O=O

15. A substance dissolved in other substances is known as a A. Compounds B. Liquid C. Solute D. Solvent

16. When a carnation is put in red colored water, the petals turn red because of A. Adhesion B. Cohension C. Thermal energy D. Capillarity

17. A solution with a pH 8 is ____ times weaker than a pH 12 A. 100 B. 1,000 C. 10,000 D. 100,000

18. The Loss of Electrons is called (hint LEO) A. Reduction B. Oxygen C. Orange D. Oxidation

19. Which of the following is a balanced equation A. C 5 H 12 + O 2 --->3 CO 2 +2 H 2 O B. Zn + HCl ---> 2ZnCl 2 + H 2 C. FeCl 3 + NH 4 OH ---> Fe(OH) 3 + NH 4 Cl D. CH4 + 2 O2 ---> CO2+ 2H2O

20. A pizza, made of crust, sauce,sausage, and cheese(not baked), is an example of A. An atom B. A compound C. A molecule D. A mixture

21. A paperclip floating on water is due to what? A. Gravity B. Surface tension C. Capillarity D. Thermal energy

22. An atom is stable when… A. Protons = Electrons B. Its inner energy level is full C. Its outer energy level is full D. Protons > Electrons

23. Electrons, protons, and neutrons are respectively located ___ in relation to the nucleus A. Inside, outside, inside B. All in the nucleus C. Outside, inside, outside D. Outside, inside, inside

24. What mostly comprises the mass of an atom? A. Protons B. Neutrons C. Electrons D. A and B E. All of the above

25. Which of the following are/is an example(s) of a diatomic molecule? A. H2 B. CO C. F2 D. A, B, and C E. A and C

26. If I make a salt water solution, identify the solvent and solute respectively. A. Salt, water B. Salt, salt water C. Water, salt D. Salt water, salt

27. Which of the following is a correct molecular formula? A. H-O-H B. 3CH4 C. methane D. H H C H H

28. Which of the following is an incorrect molecular formula? A. CO2 B. LiF C. Be3N2 D. Na2Cl

29. A noble gas readily bonds with other atoms. A. True B. False

30. Which of the following is not a chemical change? A. Melting ice B. Burning wood C. Rusting iron D. The Statue of Liberty turning green

31. Where are hydrogen bonds found? A. Cohesion B. Adhesion C. Capillarity D. All of the above

32. If the atomic # is changed, what is altered? A. The charge B. The element C. The mass

33. If you change the number of electrons, then what is altered? A. The charge B. The element C. The mass

34. C 12 and C 14 are called isotopes because the number of ________is different in the atoms. A. Electrons B. Protons C. Neutrons D. Atoms

35. Endergonic reactions release energy? A. True B. False

36. What kind of bonds hold water molecules together? A. Ionic bonds B. hydrogen bonds C. endergonic bonds D. cement bonds

37. What kind of bonds have an unequal sharing of electrons? A. Hydrogen B. Ionic C. Covalent D. Polar Covalent

38. Which of the following numbers would indicate a strong acid? A. 13 B. 8 C. 6 D. 2

39. Which are the reactants in the equation below? 2 H + + CO 3 2− H 2 O + CO 2 A. 2H, H2O B. 2H, CO2 C. 2H, CO3 D. H2O, CO2

40. Which of the following is NOT a way to make an atom stable? A. Share electrons B. Give electrons away C. Receive electrons D. Add neutrons