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 5 ) 1. The atomic mass of an element is calculated by: Dividing the mass number by the atomic number Adding the number of protons and neutrons Counting the number of electron shells Subtracting the number of protons from the number of neutrons 2. Who proposed that atoms are mostly empty space with a small, dense nucleus? Ernest Rutherford J.J. Thomson Niels Bohr James Chadwick 3. The mass of an electron is approximately equal to: 1/1840th of a proton 1/1840th of a neutron The mass of a proton The mass of a neutron 4. The atomic number of an element is equal to the number of: Neutrons Electrons Protons Isotopes 5. An atom that has gained electrons has a: Negative charge Neutral charge Positive charge Variable charge 6. Who proposed the nuclear model of the atom? Niels Bohr J.J. Thomson James Chadwick Ernest Rutherford 7. The nucleus of an atom contains: Electrons and neutrons Protons and neutrons Protons, neutrons, and electrons Electrons and protons 8. The number of protons in an atom is also known as its: Electron number Mass number Neutron number Atomic number 9. The electrons in the inner shells of an atom are called: Neutron electrons Orbital electrons Valence electrons Core electrons 10. The atomic number of an element is represented by the letter: A N M Z Loading … Pages: 1 2 3 4 5
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