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Ions quiz #11

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이 집합의 용어 (40)

  • What is the charge of a hydrogen ion formed during the dissociation of water?
    +1.
  • An atom or a molecule with either a positive or negative charge is called a(n)?
    It is called an ion.
  • A positively charged ion that makes a solution acidic is called?
    Hydronium ion (H3O+).
  • Determine the number of protons and electrons in N3-.
    N3- has 7 protons and 10 electrons.
  • A positively charged ion has one or more __.
    It has one or more fewer electrons than protons.
  • The oxygen has a ______ charge and the hydrogens a ________ charge in water.
    Oxygen has a partial negative charge; hydrogens have partial positive charges.
  • A positive ion forms when an atom ______.
    Loses electrons.
  • In order to have a positive charge, an atom must have ________.
    More protons than electrons.
  • A cation has a net charge, while an anion has a net charge.
    A cation has a positive net charge; an anion has a negative net charge.
  • What is the charge on the silver ion in AgMnO4?
    The charge on silver is +1.
  • After the transfer of the electron, sodium will form an ion with __________.
    A +1 charge.
  • A cation of +2 indicates that an element has?
    Lost two electrons.
  • When a Mg2+ ion becomes a Mg atom, the radius increases because the Mg2+ ion?
    Mg2+ has fewer electrons, so gaining electrons increases its radius.
  • An ion that consists of 7 protons, 6 neutrons, and 11 electrons has a net charge of ________.
    -4.
  • What is the charge of the metal in [Fe(NH3)2Br4]2–? Omit the + sign.
    2.
  • If nitrogen gains two electrons, which element's ion would it be isoelectronic with?
    Fluorine (F-).
  • Will Ca gain electrons to form an ion?
    No, Ca loses electrons to form Ca2+.
  • What is the atomic number of the cation formed in the reaction in the illustration?
    The atomic number is the same as the neutral atom; it does not change.
  • If an unknown monatomic ion with a 3- charge has 10 electrons, what is the formula for that ion?
    N3-.
  • Ions are described as ________ if they have the same number of electrons.
    Isoelectronic.
  • A cation is an element that _____ one or more electrons to form _____ ions.
    Loses; positive.
  • An atom or a molecule with either a positive or negative charge is referred to as a(n) .
    Ion.
  • An anion has a(n) _____ charge.
    Negative.
  • Sulfur readily forms the following monatomic ion:
    S2-.
  • An atom of magnesium has lost two electrons. It is known as a(n) ________.
    Mg2+ ion (cation).
  • Sodium is much more apt to exist as a cation than is chlorine. This is because ________.
    Sodium more easily loses an electron to form Na+.
  • When an atom that has no charge loses two electrons, it becomes a?
    A cation with a +2 charge.
  • A magnesium ion is _____ than a sodium ion.
    Smaller, due to higher charge and similar electron configuration.
  • An anion always?
    Has more electrons than protons.
  • A sodium cation is _____ than a sodium atom.
    Smaller.
  • Atoms with the same number of protons but with different electrical charges _____.
    Are different ions of the same element.
  • When electrons are removed from the outermost shell of a calcium atom, the atom becomes?
    A Ca2+ cation.
  • To become positively charged, an atom must:
    Lose electrons.
  • What is the charge of nitrate?
    Nitrate (NO3-) has a -1 charge.
  • When electrons are lost, a _____ ion is formed. When electrons are gained, a _____ ion is formed.
    Cation; anion.
  • Nonmetallic elements form ions by _____ valence electrons to complete their outer shell.
    Gaining.
  • When electrons are lost, a _____ ion is formed.
    Cation.
  • When an atom loses an electron it becomes a?
    Cation.
  • What is the charge of aluminum?
    Aluminum forms Al3+ with a +3 charge.
  • An atom or group of bonded atoms that has a positive or negative charge is called a/an?
    Ion.