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 (C)</p> Signup and view all the answers

Which quantum number determines the shape of the subshell?

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

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

<p>Orbitals (C)</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. (B)</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 (A)</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 (B)</p> Signup and view all the answers

What is the function of neutrons in an atom?

<p>Contributing to the mass of the atom (B)</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 (A)</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 (A)</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 (C)</p> Signup and view all the answers

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