Atomic Nucleus and Subatomic Particles
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Questions and Answers

What determines the element of an atom?

  • Number of protons (correct)
  • Number of electrons
  • The electron cloud
  • Number of neutrons
  • Where are protons and neutrons located in an atom?

  • Electron cloud
  • Orbits
  • Nucleus (correct)
  • Energy levels
  • What contributes to the mass of the atom?

  • Protons
  • The electron cloud
  • Electrons
  • Neutrons (correct)
  • Where do electrons occupy a region surrounding the nucleus?

    <p>Electron cloud</p> Signup and view all the answers

    Which quantum number determines the shape of the subshell?

    <p>Magnetic Quantum Number (l)</p> Signup and view all the answers

    What does the Pauli Exclusion Principle state?

    <p>No two electrons in an atom can have the same set of quantum numbers.</p> Signup and view all the answers

    What is the region within an energy level where there is a high probability of finding an electron called?

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

    Which type of orbitals come in various shapes (s, p, d, f)?

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

    What does Hund's Rule state regarding the filling of orbitals?

    <p>Electrons fill orbitals of the same energy level singly before pairing up.</p> Signup and view all the answers

    What is the role of protons in determining the nature of an element?

    <p>Determining the element and known as the atomic number</p> Signup and view all the answers

    What is the main difference between the Bohr model and the quantum mechanical model of the atom?

    <p>The Bohr model describes fixed orbits, while the quantum mechanical model describes orbitals</p> Signup and view all the answers

    What is the function of neutrons in an atom?

    <p>Contributing to the mass of the atom</p> Signup and view all the answers

    How are electrons organized in the quantum mechanical model of the atom?

    <p>Using the concept of orbitals rather than fixed orbits</p> Signup and view all the answers

    What do electrons occupy around the nucleus in an atom?

    <p>A region often referred to as the electron cloud</p> Signup and view all the answers

    Why was Niels Bohr's model of electron orbits eventually replaced by the quantum mechanical model?

    <p>It did not use the concept of orbitals for electron organization</p> Signup and view all the answers

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