Punjab 9th Class Chemistry Chapter 2 Structure of Atoms Mcqs Test Online Solved With Right Answers

Chemistry

1. According to Bohr atomic model:

The energy of the electron is inversely proportional to its distance from the nucleus.

The further the electron is form the nucleus, the more energy it has

Light is absorbed when an electron jumps a lower energy orbit.

Each orbit has fixed energy, so each orbit is called sub-energy level

Question 1 of 10

2. A sub-shell that can accommodate 6 electrons is:

p

f

d

s

Question 2 of 10

3. M shall has sub-shells:

3s, 3p, 3d

1s, 2s

1s, 2s, 3s

2s, 2p

Question 3 of 10

4. Number of neutrons in ²⁷₁₃ M are:

13

15

27

14

Question 4 of 10

5. Which isotope is commonly used to irradiate cancer calls?

Iodine-123

Iodine-131

Carbon-14

Cobalt-60

Question 5 of 10

6. Chlorine has two isotopes, both of which have

Same mass number

Different number of protons

Same number of neutrons

Same number of electrons

Question 6 of 10

7. Which isotope is used in nuclear reactors?

U-234

U-235

All of these

U-238

Question 7 of 10

8. ₁₁Na has electronic configuration:

1s²2s²2p⁷

1s²2s²3s¹

1s²2s²2p⁶3s¹

1s²2s²2p⁵3s²

Question 8 of 10

9. Which of the following statement is not correct about isotopes?

They have same physical properties

They have same chemical properties

They have sane number of protons

They have sane atomic number

Question 9 of 10

10. Rutherford used _____________ particles in his experiments.

He⁺²

He⁻²

He⁺

He atoms

Question 10 of 10

Punjab 9th Class Chemistry Chapter 2 Structure of Atoms Mcqs Test Online

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Punjab 9th Class Chemistry Chapter 2 Structure of Atoms Mcqs Test Online

Punjab 9th Class Chemistry Chapter 2 Structure of Atoms 9th Class Punjab

Chemistry

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