Science Past, Present and Future
   Home      Chemistry Wonder World
Exam 1 on Elements Atoms Ions Chemical Bonds pH Water
Chemistry Wonder World – Exam 1 on Elements Atoms Ions Chemical Bonds pH Water
© Donald Reinhardt, October 9, 2013
These questions will help you review and understand some basic information for Introductory Chemistry. Following below are links to articles which provide the good, basic information useful for answering these questions. Get ready to understand, know and succeed in chemistry.
Links to Review Chemistry Review Modules related to these questions.

1-10. Use the key below to answer questions. Choose the best answer for each question.

Think, seek understanding.

KEY: A. Atom      B. pH     C. Compound    D. Ion    E. Element

1. These are the basic, different kinds of matter and there are 92 naturally-occurring types.

2. What water is.

3. The smallest part of the basic types of matter that still is that form or type of matter.

4. Hydrogen or oxygen is this.

5. This word or term indicates a charged atom.

6. What is measured on a scale of 0 to 14.

7. Hydrogen losses an electron and becomes this.

8. Chlorine gains an electron and becomes this.

9. What is uranium.

10. If someone is measuring the amount of protons for the purpose of regulating a chemical reaction in a solution they are probably most concerned about what?

11.-15. KEY:   A. solution B. solvent C. solute

11. Water is sometimes termed the  “universal ____”.

12. Soda pop and beer are each considered to be this.

13. Table salt would be an example of a

14. Sea salt is an example of

15. Honey is best thought of as a



16. -22.  Playing with numbers in basic chemistry.

Consider each question carefully and then key in what you think is the correct number.

KEY: A. 1   B. 2  C. 3   D. 4   E. 8

16. How many electrons does a normal hydrogen atom have?

17. One hydrogen gas molecule itself would contain how many electrons for each molecule of the gas?

18. The innermost electron shell of an atom can hold how many electrons.

19. The second electron shell can hold how many electrons?

20. Carbon has how many electrons in its second shell?

21. Methane gas contains how many hydrogens?

22. Some hydrogen isotopes may have as many as ____ neutrons?

23. In an atom each proton is balanced by how many electrons typically?

24. The outermost shell of neon contains how many electrons?

25. How many neutrons are in a tritium atom?

26.-32. Indicate the type of bond expected or illustrated for each chemical below.

A. ionic  B. hydrogen C. covalent

26. sugar  

27. water  

28. table salt 

29. carbon dioxide  

30. calcium chloride

31. Which of the three bonds in the key above  is distinctly and always the weakest?

32. In genera, the strongest type bonds are usually (but not always ) (Mark A, B or C)




33. The atom can be split or disrupted by what kind of reaction?

A. fusion  B. fission  C. either reaction  D. neither reaction type

34. If one were to analyze the sun what would be the two most common types of matter found there?

A. carbon   B. oxygen C. hydrogen  D. helium  E neon

35. Cations and anions   A. can  B. can not   react with one another.

36. -40. KEY: A. carbon  B. oxygen  C. sodium D. chloride  E. ph0sporous

What is X in each formula as it relates to questions 36 – 40.

36.  8X16 would indicate what are we dealing with as X?

37.   11X23 would suggest that X here  is probably what in the KEY?

38.   15X31 would indicate to a chemist what are we dealing with as X?

39. 6X12 would indicate X is what in the key?

40. Which form of matter has the least mass weight of the 5 choices listed above?

41. -45. KEY:   A. CO2    B. O2       C. H2O      D. H2       E. N2

41.  78% of normal air is composed of this

42.  21% of normal air is composed of this

43.  When coal is burned what product is formed that many scientists believe is responsible for global warming?

44.  This was responsible for the Hindenburg Zeppelin disaster in 1937 in New Jersey.

45.  This is required for all burning or oxidation processes.

46. Rust is composed in part of:   A. Fe  B. Pb   C. Al   D. Cu  E. Mg

47.  Opposite charged atoms : A. attract  B. repel

46. Like charge atoms: A. attract   B. repel

47. Water is considered what kind of polar molecule?  A. monopolar  B. dipolar  C. tripolar

48. Hydrogen bonding occurs among the molecules in a glass of water. A. True  B. False

49.   A molecule is the smallest part of a(n): A. atom  B. bond  C. compound D. element

50. A scientist declares there is an element that consists of just a single neutron and no protons. What can we say of this discovery report.  It is: A. logical  B. illogical C. true and valid

51. – 55. Properties of water. If correct or True mark A, if False or untrue mark B

51. Water has 3 physical property states.

52. Water has adhesive and cohesive properties.

53. Water constitutes about 50% of the body weight of land animals.

54. Water cannot ionize because it does not have ionic bonds.

55.  A value of 7.0 is characteristic of pure, distilled water.

56. Indicate the heaviest among those listed: A. lead  B. mercury C. magnesium  D. uranium

57.  Which one of the following is not considered normal and essential for life:

A. C    B. O    C. H  D. N   E. Hg

58. Which one of the following would be found and critical for operation of the Goodyear blimp?

A. He2      B. N2      C. H2    D. CO2     E. O2

59.  A carbohydrate must have all but one of the following:

A. C   B. H   C. O  D. S

60.  If an inorganic strong acid and an inorganic strong base are reacted equally together what TWO things are formed. Mark TWO:

A. CO2  B. CO   C. NH3 D. H20  E. salt

61. Organic chemistry is essentially considered chemistry which is centrally based on the chemistry of:

A. hydrogen  B. oxygen  C. nitrogen  D. carbon