5a Chemical Bond I

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Question 1 of 9

1. Question
1 point(s)
Which of the following elements do not form any chemical bond with other elements under room temperature and pressure? [The symbol used is not the actual symbol of the element.]
- I. Element: W
  Proton Number: 10
- II. Element: X
  Proton Number: 15
- III. Element: Y
  Proton Number: 18
- IV. Element: Z
  Proton Number: 2
Correct

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Question 2 of 9

2. Question
1 point(s)
Which of the following group below contains only ionic compounds?
- copper(II) sulphate, hydrogen chloride, magnesium oxide
- carbon dioxide, copper(II) sulphate, sodium chloride
- carbon dioxide, copper(II) sulphate, hydrogen chloride
- sodium chloride, magnesium oxide, potassium iodide
- calcium chloride, carbon dioxide, magnesium oxide
Correct

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Question 3 of 9

3. Question
1 point(s)
The noble gases exist as mono-atomic gases in nature because
- they have valence electrons with very low energy.
- they are insoluble in water
- they have 2 or 8 electrons which is very stable.
- they have duplet or octet electron arrangement which is very stable.
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Question 4 of 9

4. Question
1 point(s)
Which of the following statements are not rue about group 18 elements
- I. All group 18 elements have very stable electron arrangement.
- II. All group 18 elements have 8 valence electrons.
- III. They form monoatomic gases in nature.
- IV. They are chemically inert.
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Question 5 of 9

5. Question
1 point(s)
Which of the following diagram shows the correct electron arrangement of a chloride ion?
[Proton number of chlorine = 17]
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Question 6 of 9

6. Question
1 point(s)
Sodium atoms and sodium ions
- have same physical properties.
- have same number of protons.
- have same number of electrons.
- have same chemical properties.
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Question 7 of 9

7. Question
1 point(s)
The electron arrangement of Y²⁻ ion is 2.8.8 and it has 16 neutrons in its nucleus. Which of the following is most likely the relative atomic mass of Y?
- 16
- 32
- 18
- 34
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Question 8 of 9

8. Question
1 point(s)
Which of the following pair of ions has the same number of electrons?
[Proton Number: H, 1; Li, 3; Na, 11; Mg, 12; S, 16; Cl, 17; Ca, 20]
- Na⁺ and Cl-
- Ca²⁺ and Cl-
- Mg²⁺ and S²⁻
- H⁺ and Li⁺
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Question 9 of 9

9. Question
1 point(s)
Which of the following atom that has nucleon number and proton number as shown below, would readily form an ion with a charge of +2?
- Nucleon number: 41
  Proton number: 20
- Nucleon number: 32
  Proton number: 16
- Nucleon number: 16
  Proton number: 8
- Nucleon number: 37
  Proton number: 18
Correct

Incorrect