Name _______________________________
Score _____________
Chemistry Review
1. _____ Which of the following is a central point of Dalton’s atomic theory?
A. chemical reactions occur when atoms destroy compounds
B. atoms of different elements are different and have different masses
C. atoms consist of elements
D. atoms of one element change into atoms of another element during a chemical reaction
2. _____ What is the common name for Thomson’s model of the atom?
A. raisin salad
B. quantum mechanics
C. garlic bread
D. plum pudding
3. _____ What is contained within the nucleus of an atom?
A. protons and neutrons
B. electrons and protons
C. electrons only
D. protons only
4. _____ Which of the following parts of an atom has a positive charge?
A. protons
B. neutrons
C. electrons
D. electron shells
5. _____ Which of the following parts of an atom has no charge?
A. protons
B. neutrons
C. electrons
D. electron shells
6. _____ What is the maximum number of electrons in the first energy level?
A. 1
B. 2
C. 8
D. 18
7. _____ How many neutrons are in an atom of nitrogen-15?
A. 6
B. 7
C. 8
D. 15
8. _____ Where are electrons found?
A. in the nucleus
C. outside the nucleus in the electron cloud
B. outside the nucleus in well defined orbits
D. attached to protons
9. _____ How many protons are in an atom of hydrogen-3?
A. 1
B. 2
C. 3
D. 4
10. _____ How many electron are in a neutral atom of beryllium-9?
A. 4
B. 5
C. 9
D. 13
11. _____ How many neutrons are in an atom of oxygen-18?
A. 6
B. 8
C. 10
D. 18
12. _____ Which of the following elements has 2 valence electrons?
A. N
B. C
C. Be
D. O
13. _____ Lithium and sodium are in the same group on the periodic table. Which of the following statements
is true?
A. they have the same number of valence electrons
B. they have the same number of protons
C. they are both noble gases
D. they have different chemical properties
14. _____ Which of the following is not a property of most metals?
A. they are solids at room temperature
B. they are shiny
C. they are good conductors of heat and electricity
D. they do not react with other elements
15. _____ How many valence electrons does silicon have?
A. 14
B. 16
C. 4
D. 2
16. _____ What is the charge on an oxygen ion?
A. +1
B. +2
C. -1
D. -2
17. _____ A covalently bonded compound has which of the following properties?
A. high melting point
B. atoms share electrons to form a bond
C. conduct electricity
D. all of the above
18. _____ What type of bond is formed when atoms exchange electrons?
A. covalent
B. hydrogen
C. ionic
D. polar
19. _____ Which of the following is most likely to have covalent bonds?
A. O2
B. NaCl
C. MgO
D. Fe2O3
20. _____ Which two elements will have the most similar chemical properties?
A. F and Cl
B. F and Ne
C. F and Ar
D. Cl and Ne
21. _____ Elements in the same groups have similar chemical properties because
A. their electrons are inside the nucleus
B. they have the same number of valence electrons
C. they have the same number of neutrons
D. they are the same size
22. _____ Which of the following elements is a halogen?
A. He
B. Cl
C. H
D. O
23. _____ How many calcium atom are in CaCO3?
A. 0
B. 1
C. 2
D. 3
24. _____ How many oxygen atoms are in H2SO4?
A. 1
B. 2
C. 4
D. 8
25. _____ What type of reaction is represented below?
AgNO3 + KCl  AgCl + KNO3
A. synthesis
B. decomposition
C. single replacement
D. double replacement
26. _____ What type of reaction is represented below?
N2 + 3H2  2NH3
A. synthesis
B. decomposition
C. single replacement
D. double replacement
27. _____ What type of reaction is represented below?
Cu + AgNO3  CuNO3 + Ag
A. synthesis
B. decomposition
C. single replacement
D. double replacement
28. _____ What type of reaction is represented below?
H2CO3  H2O + CO2
A. synthesis
B. decomposition
C. single replacement
D. double replacement
29. _____ A solid compound is placed into a beaker of liquid. You do not know the identity of either
substance. Which of the following is not evidence that a chemical reaction has occurred?
A. the solid dissolves
B. a gas is formed
C. the beaker gets hot
D. light is produced
30. _____ Which of the following represents a balanced equation?
A. H2 + O2  H2O
B. CO2 + H2O  2H2CO3
C. CH4 + O2  CO2 + 2H2O
D. N2 + 3H2  2NH3
31. _____ Which of the following is the most basic?
A. milk
B. vinegar
C. bleach
D. rain
32. _____ All of the following are bases except
A. HBr
B. Al(OH)3
C. NaOH
D. Ca(OH)2
33. _____ The pH of acid rain is
A. less than 7
B. 7
C. greater than 7
D. not measurable
34. _____ Where would you find a nuclear fusion reaction occurring?
A. in a nuclear power plant
B. in the Sun
C. in an X-ray machine
D. in a microwave oven
35. _____ Which of the following sets of numbers will correctly balance the equation below?
C3H8 + O2  CO2 + H2O
A. 1,5,3,4
B. 1,3,4,5
C. 5,4,3,1
D. 4,5,3,1