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Atoms

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  • Grinding coffee beans
    Physical Change
    Chemical Change
  • What is the atomic mass of lead?
    207.2
  • A bar of chocolate melting in the sun
    Physical Change
    Chemical Change
  • Which statement best describes an electron?
    Greater mass than a proton and a negative charge
    Smaller mass than a proton and a negative charge
    Greater mass than a proton and a positive charge
    Smaller mass than a proton and a positive charge
  • What type of charge does a proton have?
    Positive
  • An atom of chlorine has 17 protons and 18 neutrons, what is its atomic mass?
    35
  • The center of an atom is called the __________
    nucleus
  • Where are protons and neutrons found?
    Nucleus
  • A neutral atom of lead has 82 protons, how many electrons does it have?
    82
  • How many electrons are in an atom of silver?
    47
  • Rolling a ball of clay into a long straight line
    Physical Change
    Chemical Change
  • How many protons does this element have?
    7
  • Gases created when baking soda and vinegar are mixed
    Chemical Change
    Physical Change
  • Melting an ice cube to get liquid water
    Physical Change
    Chemical Change
  • _________ and _________ equal an atom's mass
    Protons and Neutrons
  • If an atom has an atomic number of 16, how many protons does it have?
    16
  • Sodium has 11 neutrons, 12 protons, and 11 electrons. What is its mass?
    23
  • The ____________ is an abbreviation for the element's name
    symbol
  • Where are electrons found?
    Electron cloud
  • All matter is made of _________
    atoms
  • What type of charge does an electron have?
    Negative
  • Negatively charged particle in an atom
    Electron
  • Baking cookies
    Chemical Change
    Physical Change
  • If an atom has an atomic number of 8, how many protons does it have?
    8
  • What type of charge does a neutron have?
    Neutral/no charge
  • Neutral particle in an atom
    Neutron
  • How many neutrons are in an atom of gold?
    118
  • Most of the mass in an atom is concentrated in the
    Electron Cloud
    Nucleus
    Protons
    Empty space
  • The overall charge of an atom is (usually) ________
    neutral
  • What do you call anything that has mass and takes up space?
    Matter
  • Positively charged particle in an atom
    Proton
  • The second energy level can hold up to how many electrons?
    8
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