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Federal (FBISE) · Chapter test · Free

9th Class Chemistry Chapter 3 Test03. Atomic Structure

30 marks · 40 minutes · 21 questions. Covers: 03. Atomic Structure.

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9th Class Chemistry Chapter 3 Test

9th Class · Chemistry · Federal (FBISE)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 30Time: 40 minutes

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

  1. Which isotope is commonly used to irradiate cancer cells?
    1. Iodine-123
    2. Carbon-14
    3. Cobalt-60
    4. Iodine-131
  2. The force present between nucleus and electron is electrostatic force of :
    1. Attraction
    2. Repulsion
    3. Both a, b
    4. None of these
  3. Which isotopes is commonly used to irradiate cancer cell.
    1. Iodine -123
    2. Carbon -14
    3. Cobalt-60
    4. Iodine-131
  4. When Rutherford was awarded noble prices?
    1. 1909
    2. 1960
    3. 1908
    4. 1925
  5. What is the percentage abundance of deuterium?
    1. 0.9999
    2. 0.000015
    3. 0.988
    4. 0.011
  6. What is visualized by using scanning tunneling microscope?
    1. Siz e of atom
    2. Protons
    3. Electrons
    4. Neutrons
  7. Angular mumentum of an electron is given by :
    1. 2π/h
    2. h/2π
    3. h+2π
    4. 2n+h
  8. Explain isotopes of Chlorine.
  9. Who is the father of nuclear science?
    1. Rutherford
    2. Bohr
    3. Planck
    4. Dalton
  10. Which isotope is used in nuclear reactors?
    1. U-234
    2. U-238
    3. U-235
    4. All of these

Q2. Short questions (Attempt any 6 of 8 · 6 × 2 = 12)

  1. How does electron affinity change as you move down a group?
    1. increase
    2. decreases
    3. remains constant
    4. fluctuates
  2. Which of the following atoms will not form cation or anion.
    1. Atomic no. 16
    2. Atomic no. 17
    3. Atomic no. 18
    4. Atomic no. 19
  3. Give discovery of isotopes contradict with Dalton`s atomic theory?
  4. Write down the function of carbohydrates?
  5. What are the defects in Rutherford`s atomic model?
  6. Write a short note on Radioisotopes?
  7. What is the conclusion of Rutherford`s atomic model?
  8. Who discovered atomic number?
    1. Moseley
    2. Bohr
    3. Rutherford
    4. Cannizaro

Q3. Long questions (Attempt any 2 of 3 · 2 × 4 = 8)

  1. The electronic configuration listed are incorrect. Explain what mistake have been made in each and write correct electronic configurations. x= 1s², 2s², 2p⁴, 3p² , y= 1s², 2s¹, 2p¹ , z= 1s²,2s², 2p⁵, 3s¹
  2. Write electronic configuration for the following elements: a) ²⁸₁₄Si b) ²⁴₁₂Mg c) ²⁷₁₃Al d) ⁴⁰₁₈Ar
  3. Explain shells and subshells also state the maximum capacity of shell and subshell?