02 Structure of Atom K1 - Final BI

8/21/2019 02 Structure of Atom K1 - Final BI

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CHEMISTRY PAPER 1 JKD KIMIA KLUANG 2012

Chapter 02 : Structure of Atom

1

CHAPTER 02 : STRUCTURE OF ATOM

2.1 Analysing Matter

1. Diagram 1 shows the apparatus set-up for the heating of ice to 60C.

Heat

Diagram 1

Which of the following shows the change in the arrangement of particleswhen ice is heated?

A

B

C

D

Note

Answer : D

2. Which of the following substances match the type of particles listed?

Substances ParticleI Silver Atom

II Ammonia Molecule

Ill Sulphur trioxide Ion

IV Sodium nitrate Ion

A I only

B III and IV

C I, II and IV

D I, II, III and IV

Note

Answer : C


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3. Diagram 1 shows the heating curve of substance X.

Diagram 1

At which part of the graph, substance X exists in both of liquid and gaseous

state?

Note

Answer : D

4. Table 1 shows proton number, nucleon number and the electronarrangement for atoms of elements W and Y.

Elements Proton number Nucleon numberElectron

arrangement

W 17 35 2.8.7

Y 17 37 2.8.7

Table 1

From Table 1, what is the conclusion can be done about atom Y?

A Atom Y is the isomer of atom W.

B Atom Y is the isotope of atom W.

C Y is the cation of atom W

D Y is the anion of atom W

Answer : B

5. Diagram 1 shows the changing in states of matter.

Diagram 1

What is process P?

A Boiling

B Melting

C Freezing

D Sublimation

Note

Answer : B

Temperature /oC

Time / min

218

114B

A

C

D


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6. Diagram 2 shows the diffusion of bromine gas.

Diagram 2

Which of the followings, the best in explaining the observation?

A Particles of bromine move randomly.

B Particles of bromine are bigger than the particles of air.

C Both of bromine and air particles are collide each other effectively.

D Particles of bromine move in empty space between particles of air.

Note

Answer : D

7. Substance Q exist in solid form at 50oC.

Which of the following is the melting point and boiling point of Q?

Melting point (oC) Boiling point (

oC)

A 80 196

B 10 45

C -20 10

D -13 55

Note

Answer : A

8. Diagram 6 shows the cooling curve for molten naphthalene.

Diagram 6

Which of the following, explains about t1to t2?

A Heat is absorbed from surroundings.

B The particles are in closely packed.

C Temperature decreases uniformly.

D Naphthalene exists as solid and liquid.

Answer : D


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9.

Diagram 1

Diagram 1 shows number of atoms in a molecule. Which of the following ispossible for the molecule?

A Carbon dioxide

B Ammonia

C Chlorine

D Water

Note

Answer : B

10. Table 3 shows the melting and boiling points of substances W, X, Y and Z.

Substance Melting point /oC Boling point /

oC

W -123 78

X -10 104

Y 59 224

Z 120 445

Table 3

What is the physical state of the substance W, X, Y and Z at 110oC?

W X Y Z

A Liquid Liquid Solid Gas

B Gas Solid Liquid Gas

C Solid Liquid Gas Gas

D Gas Gas Liquid Solid

Answer : D

11. Table 1 shows the melting point and boiling point of substance X.

Temperature/C

Melting point 78

Boiling point 245

Table 1

What is the physical state of substance X at 100C ?

A Solid

B Liquid

C Solid and liquid

D Liquid and gas

Note

Answer : B


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IceProcess Y

Water

Heat

12. Which of the following pairs are matched correctly?

Atom Ion Molecule

A Iron Mercury Hydrogen

B Aluminium Sodium Chlorine

C Sodium Lithium oxide Bromine

D Ammonia Sulphur dioxide Carbon dioxide

Note

Answer : C

13. Figure 1 shows the apparatus arrangement to study Process 1.

Diagram 1

What is Process 1?

A Condensation

B Evaporation

C Diffusion

D Sublimation

Note

Answer : C

14. Diagram 1 shows the heating of ice.

Which of the following represent Process Y?

Diagram 1

A Melting

B Condensation

C Freezing

D BoilingAnswer : A

Air

Lid

Bromin gas(brown)

Process 1Bromine gas(light brown)


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15. Diagram 2 shows the set-up of apparatus used to investigate diffusion in asolid.

Diagram 2

After a few days, the colourless solid gel turned blue.

What can we deduce from the above investigation?

A Copper(II) sulphate dissolves in the gelB Copper(II) sulphate is less dense than the gel

C Copper(II) sulphate reacts with the gel to produce blue colour

D Copper(II) sulphate particles diffuse through spaces between the gelparticles

Note

Answer : D

16. Diagram 4 shows the heating curve of solid naphthalene.

Diagram 4

Which of the following statements is true about the particles of naphthaleneat T

oC?

I The particles can only vibrate and rotate at fixed positions before t1

II Both solid and liquid are present between t1and t2III The forces of attraction between particles are overcome

IV The particles absorb heat energy

A I and III only

B II and IV only

C I, II and III only

D I, II, III and IV

Answer : D


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A

17. Which of the following substances exists as atoms?

A Carbon

B Oxygen

C Water

D Chlorine

Note

Answer : A

18. Which of the following substance is build from atoms?

A Water

B Oxygen

C Helium

D Naphthalene

Answer : C

19. The following graph shows he cooling curve for naphthalene

Suhu/C

Why does curve A happens?

A The cooling of impure naphthalene

B Naphthalene evaporate during cooling

C Naphthalene was not stirred during cooling

D Naphthalene freezing after achieve freezing point

Note

Answer : C

Temperature/oC

Time/s


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20. Diagram 1 shows the graph of the temperature against time for the heatingof naphthalene.

Diagram 1

Which of the following statement is true?

A Its melting point is 80oC

B The heat is released at Y.

C Naphthalene exists as liquid at X.D Particles are not contacted each other at Z.

Note

Answer : A

21. Diagram 6 shows the sublimation of iodine when heated.

Diagram 6

What is happen to iodine molecules?

A Contract into a smaller sizes

B Move further one another

C Vibrate at the fixed position

D Release the energy to the surroundings

Note

Answer : B

22. Which of the following represents the arrangement of particles in water?

A B

C D

Answer : B

Time / min

Temperature /oC


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23. Which of the following process, occurred when ammonium chloride isheated?

A Melting

B Sublimation

C CondensationD Boiling

Note

Answer : B

24. Which of the following statement is true?

Diagram 1

A Exist as liquid at P

B Heat is released at Q

C Its melting point is 80oC

D Particles are arranged very close at R

Answer : C

25. Which of the following chemicals undergoes sublimation when heated?

A Sodium chloride

B Ammonium chloride

C Sodium nitrate

D Ethanol

Answer : B

26. Table 1shows melting and boiling points for substances W, X, Y and Z.

SubstanceMelting point /

oC Boiling point /

oC

W -187 -126

X 75 130

Y 114 444

Z -79 68

Table 1

Which substance is a liquid at the room temperature?

A W

B X

C Y

D ZAnswer : D


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27. Which process will decrease the kinetic energy of particles in a substance?

A Melting

B Freezing

C Boiling

D Evaporation

Note

Answer : B

28. Which substance exists as molecules?

A Argon

B Magnesium

C Carbon dioxide

D Copper(II) sulphate

Note

Answer : C

29. Diagram 1 shows the change of state of matter.

Diagram 1

Which of the following is process X?

A Melting

B Boiling

C Evaporation

D Sublimation

Note

Answer : D


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30. Table 2 shows the melting and the boiling point for four substances P, Q, Rand S.

Substance Melting points (oC) Boiling points (

oC)

P 110 453

Q -20 19

R 25 98

S -60 -10

Table 2

Which substance exists as liquid at 10oC?

A P

B Q

C R

D S

Note

Answer : B

2.2 Synthesizing structure of atom

1. Isotopes of an element are different in

A chemical properties

B physical properties

C the number of protons

D the number of electrons

Note

Answer : B

2. The following statement refers to the contribution of a scientist in thedevelopment of atomic structure.

Who is the scientist who proposed the above statement?

A J.J. Thompson

B John Dalton

C James Chadwick

D Ernest Rutherford

Answer : C

Nucleus of an atom consists of proton and neutron.

Neutron is a neutral sub-atomic particle


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3. Diagram 1 shows the symbol of atom X.

Diagram 1

Which of the following is true based on Diagram 1?

Proton number Nucleon number

A 24 12

B 12 24

C 24 24

D 12 12

Note

Answer : B

4.

According to the above statement, what is the nucleon number of atom Q?

A 35

B 33

C 31

D 30

Answer : C

5. An atom of aluminium is represented by the symbol in Diagram 3 below

Diagram 3 /Rajah 3

How many protons, neutrons and electrons does an atom of aluminiumcontain?

Number of protons Number of neutrons Number of electron

A 13 14 13

B 13 27 13

C 14 13 14

D 27 14 13

Note

Answer : A

27

13Al

Atom QElectron arrangement = 2.8.5

Number of neutron = 16


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6. The symbol of sodium atom is

. The nucleus of this atom contains

A 11 protons and 12 neutrons

B 11 neutrons and 12 protons

C 11 protons and 12 electrons

D 12 neutrons and 11 electrons

Note

Answer : A

7. Which of the following represents the electron arrangement of a noble gas?

A B

C D

Nota

Answer : D

8.positively- charged sphere

negatively-charged electron

Diagram 2

Diagram 2 shows a model of an atom.

Which statement is true about the atomic model

A was proposed by J.J. Thompson

B was built based on the existence of the neutron

C shows that electrons are moving around nucleus.

D shows that an atom has nucleus

Answer : A


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9. Diagram 7 shows the symbol of aluminium atom.

Which is correct about the symbol?

Number of proton

Nucleon number

A 10 27

B 13 27

C 13 14

D 27 13

Note

Answer : B

10. Diagram 1 shows the atomic symbol of element X.

Diagram 1

Which of the following represents 19?

A Proton number

B Nucleon number

C Number of neutrons

D Number of electrons

Answer : B

11.What can be deduced from the symbol

?

I The electron arrangement of aluminium atom is 2.8.3

II Aluminium atom has 13 protons and 27 neutrons.

III Aluminium atom has a proton number of 27 and 14 neutrons.IV The total number of proton and neutron of aluminium atom is 27.

A I and III

B II and IV

C II and III

D I and IV

Note

Answer : D

27

Al13


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12. Diagram 4 below shows an atomic model.

Diagram 4

Which of the following is not true?

A Proposed by J.J.Thomson.

B The nucleus contains positively-charged particles called protons.

C The electrons move in a space that is larger than the space occupiedby the nucleus.

D The positive charge and most of the mass of the atom areconcentrated in the nucleus.

Note

Answer : A

13. Diagram 8 shows the electron arrangement of sodium atom.

Diagram 8

Which is the correct standard representation for the atom?

[Nucleon number: 23]

A B

C D

Note

Answer : B

14. A sodium atom and a sodium ion are

I isotopes

II having same number of protons.

III having same number of electrons

IV having the same number of neutron.

A II only

B II and IV only

C I, II and III only

D I, II and IV only

Answer : B


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15. The diagram shows a model of an atom.

Based on the diagram, which statement is true?

A Proposed by E. Rutherford

B Atom is an invisible particle

C Atom is a positively charged sphere

D Electrons orbital specific energy levels called shells

Note

Answer : D

16.

Who was proposed the above atomic model?

A Ernest Rutherford

B. James Chadwick

C J.J Thomson

D. Neils BohrAnswer : A

2.3 Understanding isotopes and evaluate their importance

1. Chlorine-35 and Chlorine-37 are two isotopes for chlorine.

What are the differences between the isotopes?

I Proton number

II Nucleon number

III Physical properties

IV Chemical properties

A I and II

B II and III

C I and III

D II and IV

Note

Answer : B


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2. What is the use of isotopes iodine-131?

A To treat thyroid patients

B To estimate the age of a fossil

C To kill microorganisms in food

D Sterilization of surgical instruments

Note

Answer : A

2.4 Understanding of atom electronic structure

1. Table 1 shows proton number, nucleon number and electron arrangementfor element W and Y.

Element Proton number Nucleon numberElectron

arrangement

W 17 35 2.8.7

Y 17 37 2.8.7

Table 1

From Table 1, what is the conclusion can be done about atom Y?

A Atom Y is the isomer to atom W

B Atom Y is the isotope to atom W

C Y is cation for atom W

D Y is the anion to atom W

Note

Answer : B

2. Diagram 7 shows the electron arrangement for ion M.

Atom of M has 14 neutrons.

Diagram 7

Nucleon number for atom M is

A 27

B 24

C 22

D 17

Answer : A


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3. Diagram 4 shows the electron arrangement of atom Z.

Diagram 4

How many protons are there in the nucleus of atom Z?

A 2

B 3

C 5

D 7

Note

Answer : D

4. The diagram shows the electron arrangement of atom Y.

What is the number of valence electrons of atom Y?

A 0

B 1

C 7

D 8

Answer : C

5. Among the following ion pairs, which one having the same number ofelectrons?

[Proton number : Li=3 , O=8 , F=9 , Na=11 , Mg=12 , C1=17, Ca=20]

A CI-and F

-

B Na+and Li

+

C Ca2+and Mg2+

D Mg2+

and O2-

Note

Answer : D

6. Z is the element that reacts with water to produce hydrogen gas.

Which of the following is likely to be the electron arrangement of Z?

A 2.4

B 2.8.7

C 2.8.8.1

D 2.8Answer : C


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7. Table 1 shows the number of proton, neutrons and electrons for particle G.

Particle Number of proton Number of neutron Number of electron

F 12 12 12

G 19 20 18Table 1

Which of the following is true about atom F and G?

A Mass of one atom F is 24

B Nucleon number of atom G is 37

C Number of valence electron for particle F is 2 while for particle G is 8.

D Electron arrangement for particle F is 2.10 while for particle G is 2.10.6

Note

Answer : C

8. Table 2 shows the information of two different elements.

Particle Proton number Electron arrangement

X

Y

9

17

2.8

2.8.8

Table 2

Based on the information, particles X and Y are

A Noble gases

B negative ions

C Metal atoms

D Isotopes of same element

Note

Answer : B

9. Diagram 7 shows the electron arrangement for ion of atom Q.

Diagram 7

Which of the following is true about Q?

A Atom Q is placed in group 1 of periodic table.

B Atom Q has 7 valence electrons.

C Atom Q is a noble gas.

D Atom Q has achieved octet electron arrangement.

Answer : B


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2.5 Appreciate the orderliness and uniqueness of the atomic structure

1. Table 3 shows the number of electron and number of neutron for ion X+

and Y-. Letters used in the question are not the real symbols of elements.

Ion Number of electron Number of neutron

X2+ 10 12

Y- 18 18

Table 3

Which of the following shows the correct proton number and the nucleonnumber for the ions?

Ion Proton number Nucleon number

A X2+ 12 24

B X2+

10 24

C Y- 18 37

D Y- 18 36

Note

Answer : A

2. Diagram 1 shows the symbol of fluorine atom.

Diagram 1

Which of the following is true based on the symbol in Diagram 1.

Proton number Nucleon number Number of electron

A 9 19 9

B 9 19 19

C 10 19 10

D 19 9 19

Answer : A


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ANSWERS

Sub Topic No. Answer

2.1 1. D

2. C

3. D

4. B

5. B

6. D

7. A

8. D

9. B

10. D

11. B

12. C

13. C

14. A

15. D

16. D

17. A

18. C

19. C

20. A

21. B

22. B

23. B

24. C

25. B

26. D

27. B

28. C

29. D

30. B

Sub Topic No. Answer

2.2 1. B

2. C

3. B

4. C

5. A

6. A

7. D

8. A

9. B

10. B

11. D

12. A

13. B

14. B

15. D

16. A

2.3 1. B

2. A

2.4 1. B

2. A

3. D

4. C

5. D

6. C

7. C

8. B

9. B

2.5 1. A

2. A

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02 Structure of Atom K1 - Final BI