2b The Structure of Atom II

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Question 1 of 11

1. Question
1 point(s)
CHEM10202020
Substance X exists as a liquid at a temperature of 85°C. What is the most likely melting point and boiling point of substance X?
- Melting point (°C): -15
  Boiling point (°C): 35
- Melting point (°C): -5
  Boiling point (°C): 400
- Melting point (°C): 90
  Boiling point (°C): 300
- Melting point (°C): 40
  Boiling point (°C): 80
Correct

Incorrect
Question 2 of 11

2. Question
1 point(s)
CHEM10202020
The table below shows the meting point and boiling point of substances P, Q, R and S. Which of the substance is solid at room temperature (25 °C)
- P
- Q
- R
- S
Correct

Incorrect
Question 3 of 11

3. Question
1 point(s)
CHEM10202030
Which of the following statement is true about Neils Bohr’s atomic model?
- Almost the whole mass of the atom concentrates in the nucleus.
- There are proton and neutron in the nucleus.
- The electrons in an atom orbiting the nucleus at shells with certain energy level.
Correct

Incorrect
Question 4 of 11

4. Question
1 point(s)
CHEM10202040
Which of the following match is not true?
- Scientist: J.J. Thompson
  Contribution: Discover electron
- Scientist: James Chadwick
  Contribution: Found neutron
- Scientist: Rutherforn
  Contribution: Found proton
- Scientist: Neils Bohr
  Contribution: Suggest that electrons are moving around the nucleus of an atom.
Correct

Incorrect
Question 5 of 11

5. Question
1 point(s)
CHEM10202050
Which of the following shows the correct relative mass and charge of the subatomic particles?
- Proton Relative mass: 0
  Charge: +1
- Neutron Relative mass: 1
  Charge: 0
- Electron Relative mass: 1
  Charge: -1
Correct

Incorrect
Question 6 of 11

6. Question
1 point(s)
CHEM10202060

The table above shows the properties of subatomic particles P, Q and R. Name P, Q and R.
- P: Electron
  Q: Proton
  R: Neutron
- P: Proton
  Q: Neutron
  R: Electron
- P: Neutron
  Q: Proton
  R: Electron
- P: Proton
  Q: Electron
  R: Neutron
Correct

Incorrect
Question 7 of 11

7. Question
1 point(s)
CHEM10202070

The figure above is the symbol of sulphur element. Which of the following is true about the symbol?
- Number of electron: 16
  Number of neutron: 18
  Number of proton: 16
- Number of electron: 16
  Number of neutron: 34
  Number of proton: 34
- Number of electron: 18
  Number of neutron: 16
  Number of proton: 18
- Number of electron: 13
  Number of neutron: 34
  Number of proton: 18
Correct

Incorrect
Question 8 of 11

8. Question
1 point(s)
CHEM10202080
In an atom, the number of electrons is equal to the
- Nucleon number
- Proton number
- Number of neutron
- Sum of the charge
Correct

Incorrect
Question 9 of 11

9. Question
1 point(s)
CHEM10202090
The number of subatomic particles in particle P and Q is as below.

Which of the following statement is true about particle P and Q?
- P is positively charge.
- The charge of Q is -2.
- Both P and Q carry charge.
- P and Q are difference elements.
Correct

Incorrect
Question 10 of 11

10. Question
1 point(s)
CHEM10202100

Based on the information in the table above, which of the following pair of particles are isotopes?
- P and Q
- R and S
- Q and R
Correct

Incorrect
Question 11 of 11

11. Question
1 point(s)
CHEM10202110
The table below shows the melting point and boiling points of five compounds P, Q, R, S and T. Which substance exists as a liquid at room temperature?

Substance Melting point(°C) Boiling point(°C)

P -185 -18

Q -40 45

R 10 500

S 45 900

T 800 3000
- I. P
- II. Q
- III. R
- IV. S
- V. T
Correct

Incorrect