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General Chemistry: Electron Basics

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  • What is an electron?

    An electron is a subatomic particle with a negative electric charge found outside the nucleus of an atom.

  • What is the charge of an electron?

    An electron has a charge of \(-1.602 \times 10^{-19}\\) coulombs.

  • Where are electrons located in an atom?

    Electrons are located in the electron cloud surrounding the nucleus, occupying atomic orbitals.

  • What is the approximate mass of an electron?

    The mass of an electron is about \(9.11 \times 10^{-31}\\) kilograms, much smaller than protons or neutrons.

  • How do electrons determine chemical properties?

    Chemical properties depend mainly on the arrangement and number of valence electrons in the outermost shell.

  • What is an atomic orbital?

    An atomic orbital is a region around the nucleus where there is a high probability of finding an electron.

  • What is the Pauli Exclusion Principle regarding electrons?

    It states that no two electrons in an atom can have the same set of four quantum numbers.

  • What is electron spin?

    Electron spin is a quantum property that can have values of +1/2 or -1/2, representing two possible spin states.

  • How many electrons can each atomic orbital hold?

    Each atomic orbital can hold a maximum of two electrons with opposite spins.

  • What is the significance of electron configuration?

    Electron configuration describes the distribution of electrons in an atom's orbitals and determines its chemical behavior.

  • What is an ion in terms of electrons?

    An ion is an atom or molecule that has gained or lost electrons, resulting in a net electric charge.

  • What is the role of electrons in chemical bonding?

    Electrons are shared or transferred between atoms to form covalent or ionic bonds.

  • What is the difference between core and valence electrons?

    Core electrons are inner electrons not involved in bonding; valence electrons are outer electrons involved in chemical reactions.

  • What is the photoelectric effect?

    The photoelectric effect is the emission of electrons from a material when light shines on it.

  • What is the electron's role in electricity?

    Electric current is the flow of electrons through a conductor.

  • What is an electron volt (eV)?

    An electron volt is the energy gained by an electron when accelerated through a potential difference of one volt.

  • How do electrons behave according to quantum mechanics?

    Electrons exhibit both particle and wave properties, described by quantum mechanics.

  • What is the significance of the Heisenberg Uncertainty Principle for electrons?

    It states that the exact position and momentum of an electron cannot be simultaneously known.

  • What is an electron cloud model?

    The electron cloud model represents the probable locations of electrons around the nucleus.

  • How do electrons affect atomic spectra?

    Electrons absorb and emit energy in discrete amounts, producing characteristic atomic spectra.