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 4 ) 1. Who proposed that electrons move in electron clouds rather than fixed orbits? Erwin Schrödinger J.J. Thomson Ernest Rutherford Niels Bohr 2. An atom with a positive charge is called a: Cation Anion Isotope Neutron 3. The number of neutrons in an atom can vary, resulting in different: Valence electrons Atomic numbers Mass numbers Isotopes 4. What is the charge of an electron Neutral Positive Negative Variable 5. The mass number of an atom is equal to the sum of the number of: Protons and electrons Neutrons and protons Protons, neutrons, and electrons Neutrons and electrons 6. The Bohr model of the atom is based on the concept of: Electron clouds Orbitals Nucleus Electron shells 7. The atomic number of an element is equal to the number of: Neutrons Isotopes Protons Electrons 8. Which subatomic particle is responsible for holding the nucleus together? Proton Positron Neutron Electron 9. The number of protons in an atom determines its: Atomic mass Mass number Atomic number Valence electrons 10. An atom that has gained or lost electrons is called: A compound An ion An isotope A molecule Loading … Pages: 1 2 3 4 5
by 
