Atoms: Building Blocks of Matter
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Questions and Answers

What is the definition of an atom?

  • A group of sub-atomic particles with no chemical properties
  • The largest particle of an element
  • A combination of protons, neutrons, and electrons
  • The smallest particle that can exist with the chemical properties of an element (correct)

    • What are atoms made up of?

  • Protons and electrons
  • Molecules
  • Sub-atomic particles
  • Neutrons, protons, and electrons (correct)

    • Which part of an atom is positively charged?

  • Proton (correct)
  • Neutron
  • Electron
  • Nucleus

    • How are elements formed?

    <p>By grouping many identical atoms together</p> Signup and view all the answers

    Why are protons and neutrons collectively called nucleons?

    <p>Because they make up the nucleus of an atom</p> Signup and view all the answers

    What instrument is used to observe individual atoms?

    <p>Scanning tunneling microscope (STM)</p> Signup and view all the answers

    Which sub-atomic particle is responsible for providing an atom with its chemical properties?

    <p>Proton</p> Signup and view all the answers

    What defines an atom as the smallest particle of an element?

    <p>Having the chemical properties of the element</p> Signup and view all the answers

    Which scientist proposed the model of the atom wherein protons and neutrons are in the nucleus, and electrons are in orbits around it?

    <p>Neils Bohr</p> Signup and view all the answers

    In an atom, which part is very small compared to the size of the entire atom?

    <p>Nucleus</p> Signup and view all the answers

    Why are neutrons and protons collectively called nucleons?

    <p>Because they form the nucleus of an atom</p> Signup and view all the answers

    What is the approximate diameter of a single atom?

    <p>$10^{-10}$ m</p> Signup and view all the answers

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