2c The Structure of Atom III

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Question 1 of 10

1. Question
1 point(s)
The figure shows the symbol of a carbon atom. Find the arrangement of the electrons of the carbon atom.
- 1. 2.4
- 2. 2.6
- 3. 2.8.2
- 4. 2.2.8
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Question 2 of 10

2. Question
1 point(s)
The nucleus of an atom contains
- 1. protons only
- 2. neutrons only
- 3. both protons and neutrons
- 4. both neutrons and electrons
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Question 3 of 10

3. Question
1 point(s)
One oxygen atom has 8 protons, 8 neutrons and 8 electrons. Which of the following statement is correct about oxygen atom?
- 1. I. The electronic configuration of the oxygen atom is 2.6
- 2. II. The oxygen atom has 6 valence electron
- 3. III. The nucleon number of the oxygen atom is 16
- 4. IV. The relative mass of an oxygen atom is 16
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Question 4 of 10

4. Question
1 point(s)
The table below shows the number of protons for elements P, Q, R, S and T.

Element Number of protons

P 3

Q 8

R 12

S 11

T 20

Which of the following pair of elements have the same number of valence electrons in their atom?
- 1. I. P and T
- 2. II. R and T
- 3. III. P and S
- 4. IV. Q and T
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Question 5 of 10

5. Question
1 point(s)
The table below describes the structures of four particles.

Particle O O^2- Na Na⁺

Number of
protons 8 8 11 11

Number of
neutrons 8 8 Y 12

Number of electrons 8 X 11 Z

What are the correct values of X, Y and Z?
- 1. X: 9
  Y: 11
  Z: 10
- 2. X: 9
  Y: 11
  Z: 11
- 3. X: 10
  Y: 12
  Z: 10
- 4. X: 10
  Y: 12
  Z: 11
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Question 6 of 10

6. Question
1 point(s)
CHEM10203010

Which of the following is not a correct use of radioisotope?
- 1. Cobalt-60 kill cancer cells without surgery in patients.
- 2. Sodium-24 detect tumours and blood clots before they become dangerous.
- 3. Carbon-14 to kill bacteria in food and hence make fresh vegetables and fruits last longer
- 4. Plutonium-238 produce small electric shocks in the heart pacemaker.
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Question 7 of 10

7. Question
1 point(s)
The figure shows an atom with 14 electrons. The electron arrangement of the atom is
- 1. 2.8.4
- 2. 2.4.8
- 3. 14.2.8
- 4. 4.8.2
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Question 8 of 10

8. Question
1 point(s)
The maximum number of electrons can be filled into the second shell of an atom is _____.
- 1. 2
- 2. 4
- 3. 6
- 4. 8
- 5. 18
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Question 9 of 10

9. Question
1 point(s)
Table below shows the number of neutrons, protons and electrons of particles X and Y.

Particle
Zarah Number of
neutrons
Bilangan neutron Number of
proton
Bilangan proton Number of
electrons
Bilangan elektron

X 12 12 12

Y 12 12 10

Which of the following is true about X and Y?
- 1. I. Both X and Y are ions
- 2. II. Both X and Y are isotopes
- 3. III. X has two valence electron
- 4. IV. Y has a charge of +2
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Question 10 of 10

10. Question
1 point(s)
The diagram shows an atom with 18 electrons. If 1 more electron is added into the atom, the atom will fall into which shell?
- 1. First shell.
- 2. Second shell
- 3. Third shell
- 4. Forth shell
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2c The Structure of Atom III

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Element	Number of protons
P	3
Q	8
R	12
S	11
T	20

Particle	O	O^2-	Na	Na⁺
Number of protons	8	8	11	11
Number of neutrons	8	8	Y	12
Number of electrons	8	X	11	Z

Particle Zarah	Number of neutrons Bilangan neutron	Number of proton Bilangan proton	Number of electrons Bilangan elektron
X	12	12	12
Y	12	12	10