GENERAL SCIENCE CLASS 7 Chapter 6: Structure of an Atom Class 7 MCQS by Shoaib GabolFebruary 2, 2024March 20, 2024 Structure of an Atom ( PART 2 ) 1. Who proposed that electrons move around the nucleus in specific orbits or shells? J.J. Thomson Who proposed that electrons move around the nucleus in specific orbits or shells? James Chadwick Niels Bohr 2. The number of electrons in a neutral atom is equal to: The atomic number Twice the number of protons The mass number The number of protons 3. Which of the following particles is not found in the nucleus of an atom? Proton Electron Neutron Positron 4. Isotopes of an element have the same number of: Electrons Both protons and neutrons Protons Neutrons 5. The atomic number of an element is equal to the number of: Neutrons Protons Electrons Both protons and neutrons 6. Which of the following statements about atoms is true? All atoms of the same element have the same number of neutrons. All atoms of the same element have the same mass number. All atoms of the same element have the same number of electrons. All atoms of the same element have the same atomic mass. 7. The charge of a proton is: Variable Positive Neutral Negative 8. The number of neutrons in an atom can be calculated by subtracting the: Number of electrons from the atomic mass Atomic number from the atomic mass Atomic number from the mass number Atomic mass from the atomic number 9. The mass number of an atom is equal to the sum of the number of: Protons and neutrons Protons and electrons Protons, neutrons, and electrons Neutrons and electrons 10. Which subatomic particle has a negligible mass? Positron Electron Neutron Proton Loading … Pages: 1 2 3 4 5
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