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ICSE Class 9 Atomic Structure — practice questions

Explore 26 free Atomic Structure questions in ICSE Class 9 Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Atomic Structure questions and exercises with answers

Showing questions 1–26 of 26.

Sort the particles inside an atomRead the answer and worked solution →Find the bad digit in each setupRead the answer and worked solution →Judge these atom and isotope linesRead the answer and worked solution →The atomic number of an element equals its number of:Read the answer and worked solution →Mass number of an atom is the sum of its:Read the answer and worked solution →Which is the charge on a proton?Read the answer and worked solution →Mass of a proton compared with that of an electron is:Read the answer and worked solution →Neutrons have a charge of:Read the answer and worked solution →Electronic configuration of sodium (Z = 11) is:Read the answer and worked solution →Maximum number of electrons that can occupy the L shell is:Read the answer and worked solution →Two atoms have the same mass number but different atomic numbers. They are:Read the answer and worked solution →The K shell can hold a maximum of:Read the answer and worked solution →Alpha particles used by Rutherford in his scattering experiment are:Read the answer and worked solution →Rutherford's experiment showed that an atom is:Read the answer and worked solution →Bohr's model improved on Rutherford's by:Read the answer and worked solution →Valence electrons are the electrons in the:Read the answer and worked solution →Atomic number of chlorine is 17. Its electronic configuration is:Read the answer and worked solution →An ion is formed when an atom:Read the answer and worked solution →Magnesium (Z = 12) forms Mg^2+ by losing how many electrons?Read the answer and worked solution →Chlorine (Z = 17) becomes Cl- by gaining how many electrons?Read the answer and worked solution →Isotopes of hydrogen include:Read the answer and worked solution →Why are protons and neutrons together called nucleons?Read the answer and worked solution →An atom of oxygen has Z = 8 and A = 16. Number of neutrons is:Read the answer and worked solution →Why does the atomic mass of chlorine (35.5) lie between two integers?Read the answer and worked solution →If an element has the configuration 2, 8, 8, 1, its valency and likely group are:Read the answer and worked solution →Which sub-particle was discovered LAST?Read the answer and worked solution →

Worked practice questions

Sort the particles inside an atom

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Items
  1. Item
    Proton
    Answer
    left
  2. Item
    Neutron
    Answer
    left
  3. Item
    Electron
    Answer
    left
  4. Item
    Molecule
    Answer
    right
  5. Item
    Ion
    Answer
    right
  6. Item
    Crystal
    Answer
    right
Categories
Left
Subatomic particle
Right
Not subatomic
Instructions
Swipe each card left for Subatomic particle or right for Not subatomic.

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Find the bad digit in each setup

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Questions
  1. Statement parts
    1. Sodium
    2. (11)
    3. :
    4. 2
    5. ,
    6. 8
    7. ,
    8. 2
    Correction
    Sodium has 11 electrons. Correct configuration is 2, 8, 1.
    Incorrect part
    2
  2. Statement parts
    1. Argon
    2. (18)
    3. :
    4. 2
    5. ,
    6. 8
    7. ,
    8. 10
    Correction
    Argon has 18 electrons. Correct configuration is 2, 8, 8.
    Incorrect part
    10
  3. Statement parts
    1. Calcium
    2. (20)
    3. :
    4. 2
    5. ,
    6. 8
    7. ,
    8. 8
    9. ,
    10. 4
    Correction
    Calcium has 20 electrons. Correct configuration is 2, 8, 8, 2.
    Incorrect part
    4
Instructions
Each line shows how electrons sit in an atom's shells. Tap the digit that does not fit.

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Judge these atom and isotope lines

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Questions
  1. Statement is true
    Yes
    Statement
    Atomic number equals the number of protons in the nucleus.
  2. Statement is true
    Yes
    Statement
    Isotopes of an element have different numbers of neutrons.
  3. Statement is true
    No
    Statement
    The mass of an electron is roughly equal to that of a proton.
  4. Statement is true
    No
    Statement
    Cathode rays travel from anode to cathode.
Instructions
Tap true or false for each line about protons, isotopes and cathode rays.

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