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Ions quiz #2

컨트롤 버튼이 '내비게이션' 모드로 변경되었습니다.
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  • What is the charge on sodium?
    The charge on a sodium ion is +1 after it loses one electron.
  • Magnesium has an atomic number of 12. What is the most stable charge for a magnesium ion?
    The most stable charge for a magnesium ion is +2.
  • What is a cation?
    A cation is a positively charged ion formed when an atom loses electrons.
  • What ion is formed when an atom of mercury (Hg) loses two electrons?
    Hg2+ is formed when mercury loses two electrons.
  • What is the charge of a magnesium ion?
    The charge of a magnesium ion is +2.
  • How many ions with a +1 charge will bond with an ion that has a -2 charge to form a neutral compound?
    Two ions with a +1 charge will bond with one ion with a -2 charge.
  • Which is a characteristic of all ions?
    All ions have an unequal number of protons and electrons, resulting in a net charge.
  • What ion is formed when an atom of magnesium (Mg) loses two electrons?
    Mg2+ is formed when magnesium loses two electrons.
  • What is the charge on a hydroxide ion?
    The charge on a hydroxide ion is -1.
  • Which element is most likely to form a -3 ion?
    Nitrogen is most likely to form a -3 ion.
  • Which species has the same number of electrons as Cl-?
    K+ has the same number of electrons as Cl- (18 electrons).
  • Which ion could bond with a calcium ion (Ca2+) to form a neutral ionic compound?
    An ion with a -2 charge, such as SO4^2-, could bond with Ca2+.
  • How many ions with a +1 charge will bond with an ion that has a -2 charge?
    Two ions with a +1 charge will bond with one ion with a -2 charge.
  • What is the charge of a chloride ion?
    The charge of a chloride ion (Cl-) is -1.
  • What type of ion has lost an electron?
    A cation has lost one or more electrons.
  • If a droplet has three extra electrons, what is its net charge?
    Its net charge is -3.
  • What is a rule for making a negative ion with negative charge?
    An atom must gain electrons to become a negative ion (anion).
  • What is a positively charged ion called?
    A positively charged ion is called a cation.
  • How many electrons will chlorine gain or lose when it forms an ion?
    Chlorine will gain one electron to form Cl-.
  • What is the most stable ion formed by phosphorus?
    Phosphorus most stably forms a P3- ion.
  • Which is an atom or group of bonded atoms that has a positive or negative charge?
    An ion is an atom or group of atoms with a positive or negative charge.
  • Which species has the same number of protons as Fe3+?
    Fe2+ has the same number of protons as Fe3+ (26 protons).
  • What type of ion forms when an atom loses electrons?
    A cation forms when an atom loses electrons.
  • What is the net charge of a monatomic ion that has 15 protons?
    The net charge depends on the number of electrons; if it has 18 electrons, the charge is -3.
  • What is the charge of the hydronium ion?
    The charge of the hydronium ion is +1.
  • How many electrons are in O2-?
    O2- has 10 electrons.
  • Which ions are produced when water ionizes?
    Water ionizes to produce H+ (or H3O+) and OH- ions.
  • What is the charge of a chlorine ion?
    A chlorine ion (Cl-) has a charge of -1.
  • An ion has a net charge of 3+. If this ion has 8 protons, how many electrons does it have?
    It has 5 electrons.
  • When is an atom most stable?
    An atom is most stable when it has a full valence shell (octet).
  • What type of elements form anions?
    Nonmetals typically form anions.
  • How many electrons does the oxygen atom need to become stable?
    Oxygen needs to gain 2 electrons to become stable.
  • Which species has the greatest charge density?
    Mg2+ has the greatest charge density due to its small size and high charge.
  • Which pair of ions have the same total number of electrons?
    Na+ and F- both have 10 electrons.
  • What is the term for an ion with a net negative charge (more electrons than protons)?
    An ion with a net negative charge is called an anion.
  • What is a cation and where can you find it on the periodic table?
    A cation is a positively charged ion, typically formed by metals on the left side of the periodic table.
  • Which ion will form a compound with bicarbonate in a 1:1 cation to anion ratio?
    A +1 cation, such as Na+, will form a 1:1 compound with bicarbonate (HCO3-).
  • Which following ions has the same electron configuration as a noble gas?
    Na+, F-, and Cl- have electron configurations like noble gases.
  • Which of these ions is isoelectronic to the oxide anion O2-?
    Ne, F-, and Na+ are isoelectronic to O2-.
  • How does a lithium cation compare to a lithium atom?
    A lithium cation (Li+) has one less electron and is smaller than a neutral lithium atom.