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Exploring matter

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  • Which of the following is an intensive physical property?
    Density
  • What determines the atomic number of an element?
    The number of protons
    The number of electrons
    The number of isotopes
    The number of neutrons
  • What happens to the particles in a solid when it melts?
    They stop moving.
    They move faster and spread out.
    They move more slowly.
    They become closer together.
  • What happens to the substance when it undergoes a chemical change?
    It retains its chemical identity.
    It changes shape or appearance.
    It changes color.
    It forms a new substance with a different chemical composit
  • The change of a substance from a solid to a liquid is a:
    Biological phenomenon
    Nuclear phenomenon
    Chemical phenomenon
    Physical phenomenon
  • Which process describes a solid turning directly into a gas?
    Sublimation
    Deposition
    Freezing
    Condensation
  • What is the location of electrons in an atom?
    In the orbitals
  • Which of the following describes a chemical property?
    The ability of iron to rust
    The boiling point of water
    The color of a flower
    The density of gold
  • Which state of matter takes the shape of its container but has a definite volume?
    Liquid
  • Which subatomic particle has a positive charge?
    Proton
  • Which subatomic particles have nearly the same mass?
    Electrons and neutrons
    Protons and electrons
    Protons and neutrons
    Neutrons and ions
  • What happens if an atom gains or loses electrons?
    It becomes an ion
    It gains neutrons
    It becomes radioactive
    It becomes neutral
  • An atom with more electrons than protons is called a:
    Neutron
    Ion
    Isotope
    Proton
  • Which of these is the atomic number for Carbon?
    12
    1
    6
    8
  • If an atom has 7 protons and 7 neutrons, what is its mass number?
    14
  • What does the atomic number represent in an element?
    The number of neutrons
    The number of electrons in a neutral atom
    The number of protons and neutrons
    The number of protons
  • What is the physical property that describes a liquid’s resistance to flowing?
    Viscosity
    Malleability
    Thermal conductivity
    Density
  • Which state of matter is easiest to compress?
    GAS
  • Where are neutrons located in an atom?
    In the nucleus
  • What is the sum of protons and neutrons in an atom called?
    Neutron number
    Mass number
    Charge
    Atomic number
  • A substance reacts with oxygen to form a new substance. What property of the substance is being described?
    Chemical property
  • Which state of matter has a definite shape and volume?
    SOLID
  • What is an example of an extensive physical property?
    Density
    Volume
    Boiling point
    Color
  • Which of the following is a sign of a chemical reaction?
    Change in shape
    Change in size
    Change in temperature
    Change in color of an object
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