! 1!

Practice(for(IB(Chemistry(SL(Exam(1((((((Name:(___________________________(!

Topics!2,!3!&!C.3!!!! ! !!!!!!!!!!!Exam%1%in%class%will%be%30%Questions.!!!

Important(Information!(

(

Please!note!that!Topics!2!and!3!will!make!up!only!about!1/6th!of!

your!actual!Paper!1,!but!for!our!first!Exam!this!year!will!each!make!

up!about!13!of!the!30!Exam!1!questions!(leaving!about!6!questions!

for!Topic!C.3).!

!

Also!note!that!Option!C:!Energy!will!not!be!tested!on!an!actual!

Paper!1!but!rather!as!a!significant!chunk!of!Paper!3,!which!is!

marked!out!of!35!points.!!“Section!A”!of!Paper!3!contains!several!

multiQpart,!short!answer!questions!from!across!the!curriculum!and!

represents!15!points!of!the!35.!!“Section!B”!of!Paper!3!contains!four!

options!(each!comprised!of!several!multiQpart,!short!answer!

questions),!and!students!must!answer!all!of!the!questions!for!only!

one!of!the!four!options.!

Option!A!=!Materials!(20!points)!

Option!B!=!Biochemistry!(20!points)!

Option!C!=!Energy!(20!points)!

Option!D!=!Medicinal!chemistry!(20!points)!

We!will!be!studying!Option!C!in!class;!however,!if(you(have(

compelling(interest(and/or(resources(that(promote(a(different(

Option,(you(may(talk(with(Ms.(Clewett(ASAP(and(“buy(out”(of(

studying(Option(C.!!If!you!select!this!choice,!you!will!be!essentially!

opting!into!a!selfQstudy!program!with!relatively!minimal!classroom!

support.!

! 2!

!

!

Topic 2 Questions

1. Consider the composition of the species W, X, Y and Z below. Which species is an anion?

Species Number of protons Number of neutrons Number of electrons

W 9 10 10

X 11 12 11

Y 12 12 12

Z 13 14 10

A. W

B. X

C. Y

D. Z (Total 1 mark)

2. Energy levels for an electron in a hydrogen atom are

A. evenly spaced.

B. farther apart near the nucleus.

C. closer together near the nucleus.

D. arranged randomly. (Total 1 mark)

3. Which is related to the number of electrons in the outer main energy level of the elements from the alkali metals to the halogens?

I. Group number

II. Period number

A. I only

B. II only

C. Both I and II

D. Neither I nor II (Total 1 mark)

! 3!

4. What is the correct number of each particle in a fluoride ion, 19F–?

protons neutrons electrons

A. 9 10 8

B. 9 10 9

C. 9 10 10

D. 9 19 10 (Total 1 mark)

5. Which statement is correct for the emission spectrum of the hydrogen atom?

A. The lines converge at lower energies.

B. The lines are produced when electrons move from lower to higher energy levels.

C. The lines in the visible region involve electron transitions into the energy level closest to the nucleus.

D. The line corresponding to the greatest emission of energy is in the ultraviolet region.

6. Which statement(s) is/are generally true about the melting points of substances?

I. Melting points are higher for compounds containing ions than for compounds containing molecules.

II. A compound with a low melting point is less volatile than a compound with a high melting point.

III. The melting point of a compound is decreased by the presence of impurities.

A. I only

B. I and III only

C. II and III only

D. I, II and III

(Total 1 mark)

7. How many valence electrons are present in an atom of an element with atomic number 16?

A. 2

B. 4

C. 6

D. 8 (Total 1 mark)

! 4!

8. A certain sample of element Z contains 60% of 69Z and 40% of 71Z. What is the relative atomic mass of element Z in this sample?

A. 69.2

B. 69.8

C. 70.0

D. 70.2

(Total 1 mark)

9. What is the difference between two neutral atoms represented by the symbols Co and Ni?

A. The number of neutrons only.

B. The number of protons and electrons only.

C. The number of protons and neutrons only.

D. The number of protons, neutrons and electrons. (Total 1 mark)

10. The electron arrangement of sodium is 2.8.1. How many occupied main electron energy levels are there in an atom of sodium?

A. 1

B. 3

C. 10

D. 11 (Total 1 mark)

11. Information is given about four different atoms:

Atom neutrons protons

W 22 18

X 18 20

Y 22 16

Z 20 18

Which two atoms are isotopes?

A. W and Y

B. W and Z

C. X and Z

D. X and Y (Total 1 mark)

! 5!

12. Which statement is correct about a line emission spectrum?

A. Electrons absorb energy as they move from low to high energy levels.

B. Electrons absorb energy as they move from high to low energy levels.

C. Electrons release energy as they move from low to high energy levels.

D. Electrons release energy as they move from high to low energy levels. (Total 1 mark)

13. How many neutrons are there in the ion 18O2–?

A. 8

B. 10

C. 16

D. 20

(Total 1 mark)

14. What is the electron arrangement of silicon?

A. 2.4

B. 2.8

C. 2.8.4

D. 2.8.8 (Total 1 mark)

15. Which statement is correct about the isotopes of an element?

A. They have the same mass number

B. They have the same electron arrangement

C. They have more protons than neutrons

D. They have the same numbers of protons and neutrons (Total 1 mark)

16. Which statements are correct for the emission spectrum of the hydrogen atom?

I. The lines converge at lower energies. II. Electron transition to n =1 are responsible for lines in the UV region. III. Lines are produced when electrons move from higher to lower energy levels.

A. I and II only

B. I and III only

C. II and III only

D. I, II and III (Total 1 mark)

! 6!

17. What is the electron arrangement of an Al3+ ion?

A. 2, 8

B. 2, 3

C. 2, 8, 3

D. 2, 8, 8 (Total 1 mark)

18. What will happen to the volume of a fixed mass of gas if the pressure and the Kelvin temperature are both doubled?

A. It will remain the same.

B. It will be double its initial volume.

C. It will be one-half its initial volume.

D. It will be four times its initial volume. (Total 1 mark)

19. What is the correct sequence for the processes occurring in a mass spectrometer?

A. vaporization, ionization, acceleration, deflection

B. vaporization, acceleration, ionization, deflection

C. ionization, vaporization, acceleration, deflection

D. ionization, vaporization, deflection, acceleration (Total 1 mark)

Topic 3 Questions

20. Which pair of elements reacts most readily?

A. Li + Br2

B. Li + Cl2

C. K + Br2

D. K + Cl2 (Total 1 mark)

! 7!

21. Which of the following properties of the halogens increase from F to I?

I. Atomic radius

II. Melting point

III. Electronegativity

A. I only

B. I and II only

C. I and III only

D. I, II and III (Total 1 mark)

22. For which element are the group number and the period number the same?

A. Li

B. Be

C. B

D. Mg (Total 1 mark)

23. Which of the physical properties below decrease with increasing atomic number for both the alkali metals and the halogens?

I. Atomic radius

II. Ionization energy

III. Melting point

A. I only

B. II only

C. III only

D. I and III only (Total 1 mark)

24. Rubidium is an element in the same group of the periodic table as lithium and sodium. It is likely to be a metal which has a

A. high melting point and reacts slowly with water.

B. high melting point and reacts vigorously with water.

C. low melting point and reacts vigorously with water.

D. low melting point and reacts slowly with water. (Total 1 mark)

! 8!

25. When the following species are arranged in order of increasing radius, what is the correct order?

A. Cl–, Ar, K+

B. K+, Ar , Cl–

C. Cl–, K+, Ar

D. Ar, Cl–, K+ (Total 1 mark)

26. What increases in equal steps of one from left to right in the periodic table for the elements lithium to neon?

A. the number of occupied electron energy levels

B. the number of neutrons in the most common isotope

C. the number of electrons in the atom

D. the atomic mass (Total 1 mark)

27. Which property decreases down group 17 in the periodic table?

A. atomic radius

B. electronegativity

C. ionic radius

D. melting point (Total 1 mark)

28. Which properties are typical of most non-metals in period 3 (Na to Ar)?

I. They form ions by gaining one or more electrons.

II. They are poor conductors of heat and electricity.

III. They have high melting points.

A. I and II only

B. I and III only

C. II and III only

D. I, II and III (Total 1 mark)

! 9!

29. A potassium atom has a larger atomic radius than a sodium atom. Which statement about potassium correctly explains this difference?

A. It has a larger nuclear charge.

B. It has a lower electronegativity.

C. It has more energy levels occupied by electrons.

D. It has a lower ionization energy. (Total 1 mark)

30. Which factors lead to an element having a low value of first ionization energy?

I. large atomic radius

II. high number of occupied energy levels

III. high nuclear charge

A. I and II only

B. I and III only

C. II and III only

D. I, II and III (Total 1 mark)

31. Which statement about electronegativity is correct?

A. Electronegativity decreases across a period.

B. Electronegativity increases down a group.

C. Metals generally have lower electronegativity values than non-metals.

D. Noble gases have the highest electronegativity values. (Total 1 mark)

32. Which statement is correct for a periodic trend?

A. Ionization energy increases from Li to Cs.

B. Melting point increases from Li to Cs.

C. Ionization energy increases from F to I.

D. Melting point increases from F to I. (Total 1 mark)

! 10!

32. Which compound of an element in period 3 reacts with water to form a solution with a pH greater than 7?

A. SiO2

B. SiCl4

C. NaCl

D. Na2O (Total 1 mark)

34. Which equation represents the first ionization energy of fluorine?

A. F(g) + e– → F–(g)

B. F–(g) → F(g) + e–

C. F+(g) → F(g) + e–

D. F(g) → F+(g) + e– (Total 1 mark)

35. Which statement is correct for the halogen group?

A. Halide ions are all reducing agents, with iodide ions being the weakest.

B. Halogens are all oxidizing agents, with chlorine being the strongest.

C. Chloride ions can be oxidized to chlorine by bromine.

D. Iodide ions can be oxidized to iodine by chlorine. (Total 1 mark)

36. Which of the following statements are correct?

I. The melting points decrease from Li → Cs for the alkali metals. II. The melting points increase from F → I for the halogens. III. The melting points decrease from Na → Ar for the period 3 elements.

A. I and II only

B. I and III only

C. II and III only

D. I, II and III (Total 1 mark)

! 11!

37. Which element is a transition metal?

A. Ca

B. Cr

C. Ge

D. Se (Total 1 mark)

38. When Na, K, and Mg are arranged in increasing order of atomic radius (smallest first), which order is correct?

A. Na, K, Mg

B. Na, Mg, K

C. K, Mg, Na

D. Mg, Na, K (Total 1 mark)

39. Which oxides produce an acidic solution when added to water?

I. SiO2

II. P4O6

III. SO2

A. I and II only

B. I and III only

C. II and III only

D. I, II and III (Total 1 mark)

40. Which series is arranged in order of increasing radius?

A. Ca2+ < Cl– < K+

B. K+ < Ca2+ < Cl–

C. Ca2+ < K+ < Cl–

D. Cl– < K+ < Ca2+ (Total 1 mark)

Question Source (Topics 2 & 3): https://sites.google.com/a/nisbah.com/chemistry/IBDP-Chemistry/dp-chemistry Also excellent: http://masseychem.weebly.com/ib-review-answer-keys.html

! 12!

Topic C.3 Questions

Once again, please note that Option C will not be tested in your actual IB Paper 1 but rather in short answer format on Paper 3, as exemplified below.

For our purposes on Exam 1 at this time, we will be using all multiple-choice questions. I hope it is obvious that the questions shown below are not exhaustive, nor are they fully representative of what we have learned in class. Please be prepared for anything that we discussed in class (mass defect, binding energy, etc.) and especially those things that were mentioned as being good for quiz preparation.

! 13!

41. Complete the nuclear equation shown: U!"!"# !+ !! n!! !→ ! Sr!"

!" + !! _______ !!+ !10!! n!! !!

A. Xe!"!"#

B. Xe!"!"#

C. Xe!"!"#

D. Xe!"!"#

(Total 1 mark)

42. What term accounts for the fact that the mass of a helium nucleus is smaller than the sum of the masses of 2 protons and 2 neutrons?

A. fusion

B. fission

C. mass defect

D. rest mass (Total 1 mark)

!!!!!!!!!!

Answers:!!1.!A!!!!!!!!!2.!B!!!!!!3.!A!!!!!!4.!C!!!!!5.!D!!!!!!6.!B!!!!!7.!C!!!!!8.!B!!!!!9.!D!!!!!10.!B!!!!!!11.!B!!!!12.!D!!!!!13.!B!!!!14.!C!!!!15.!B!!!!16.!C!!17.!A!!!18.!A!!!19.!A!!!20.!D!!!21.!B!!!22.!B!!!!!23.!B!!!(24.!C!!25.!B!!!!26.!C!!!!27.!B!!!!28.!A!!!29.!C!!!30.!A!!!31.!C!!!32.!D!!!33.!D!!!34.!D!!!!35.!D!!!!36.!A!!!!37.!B!!!!38.!D!!!!39.!C!!!!40.!C!!!41.!B!!!42.!C!

– 2 – SPEC/4/CHEMI/HPM/ENG/TZ0/XX

88 Ra

(226

)

56 Ba

137.

33

38 Sr87

.62

20 Ca

40.0

8

12 Mg

24.3

1

4 Be

9.012

‡†

89 ‡

Ac

(227

)

57 †

La13

8.91

39 Y88

.91

21 Sc 44.9

6

90 Th23

2.04

58 Ce

140.

12

72 Hf

178.

49

40 Zr 91.2

2

22 Ti47

.87

91 Pa23

1.04

59 Pr14

0.91

73 Ta18

0.95

41 Nb

92.9

1

23 V50

.94

92 U23

8.03

60 Nd

144.

24

74 W18

3.84

42 Mo

95.9

6

24 Cr

52.0

0

55 Cs

132.

91

37 Rb

85.4

7

19 K39

.10

11 Na

22.9

9

3 Li 6.941 H 1.011 Fr87 (223

)

93 Np

(237

)

61 Pm (145

)

75 Re

186.

21

43 Tc (98)25 Mn

54.9

4

94 Pu (244

)

62 Sm15

0.36

76 Os

190.

23

44 Ru

101.

07

26 Fe 55.8

5

95 Am

(243

)

63 Eu15

1.96

77 Ir19

2.22

45 Rh

102.

91

27 Co

58.9

3

96 Cm

(247

)

64 Gd

157.

25

78 Pt19

5.08

46 Pd10

6.42

28 Ni

58.6

9

97 Bk

(247

)

65 Tb15

8.93

79 Au

196.

97

47 Ag

107.

87

29 Cu

63.5

5

The

Perio

dic

Tabl

e

Ato

mic

num

ber

Elem

ent

Rel

ativ

e at

omic

mas

s

98 Cf

(251

)

66 Dy

162.

50

80 Hg

200.

59

48 Cd

112.

41

30 Zn 65.3

8

99 Es (252

)

67 Ho

164.

93

81 Tl20

4.38

49 In11

4.82

31 Ga

69.7

2

13 Al

26.9

8

5 B10

.81

13

100

Fm (257

)

68 Er16

7.26

82 Pb 207.

2

50 Sn11

8.71

32 Ge

72.6

3

14 Si28

.09

6 C12

.01

14

101

Md

(258

)

69 Tm16

8.93

83 Bi

208.

98

51 Sb12

1.76

33 As

74.9

2

15 P30

.97

7 N14

.01

15

102

No

(259

)

70 Yb17

3.05

84 Po (209

)

52 Te12

7.60

34 Se78

.96

16 S32

.07

8 O16

.00

16

103

Lr (262

)

71 Lu17

4.97

85 At

(210

)

53 I12

6.90

35 Br

79.9

0

17 Cl

35.4

5

9 F19

.00

17

86 Rn

(222

)

54 Xe13

1.29

36 Kr

83.9

0

18 Ar

39.9

5

10 Ne

20.1

8

2 He

4.0018

34

56

78

910

1112

1 2 3 4 5 6 710

4 R

f(2

67)

105

Db

(268

)

106

Sg (269

)

107

Bh

(270

)

108

Hs

(269

)

109

Mt

(278

)

110

Ds

(281

)

111

Rg

(281

)

112

Cn

(285

)

113

Unt

(286

)

114

Uug

(289

)

115

Uup

(288

)

116

Uuh

(293

)

117

Uus

(294

)

118

Uuo

(294

)