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Isotopes Review

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  • How many protons does Calcium have?
    20
  • What do these isotopes of carbon all have in common?
    atomic number and neutrons
    protons, atomic number, and mass number
    neutrons and mass number
    atomic number and electrons
  • How many electrons are in an atom with an atomic number of 50?
    50
  • How many neutrons in C-14?
    8
  • How many neutrons in C-14?
    8
  • A charge of +2 means you have
    more electrons than neutrons
    more electrons than protons
    more protons than electrons
    more protons than neutrons
  • If you want to determine the total number of protons and neutrons in an atom, you can refer to the...
    atomic weight
    ion number
    atomic number
    mass number
  • If Beryllium is electrically neutral, how many electrons does it have?
    4
  • Which atom has 4 neutrons?
    Li-8
    they have the same # of neutrons
    Li-6
    Li-7
  • Isotopes differ in the number of
    neutrons
    electrons
    protons
  • For an atom to have an overall negative charge
    electrons were lost
    electrons were gained
  • The atomic mass of an element is the weighted average of the masses of all its ______ that occur naturally
    neutrons
    electrons
    isotopes
    protons
  • How many neutrons does an atom of the isotope Neon-22 have?
    12
  • What is the mass number defined as?
    the number of neutrons
    the number of protons and neutrons
    the number of protons
    the number of protons and electrons
  • How many neutrons does the isotope of lithium-8 have?
    5
  • If Aluminum has a charge of +3, how many electrons are present?
    10
  • If Arsenic has a charge of -3, then how many electrons does it have?
    36
  • How do you calculate mass number?
    protons + neutrons
  • The atomic number represents the number of...
    protons
    ions
    electrons
    neutrons
  • In uranium - 235 what does 235 represent?
    mass number
  • What subatomic particle can NEVER change?
    protons