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Atomic Lexicon Challenge!

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  • What is the difference between a compound and an element?
    A compound consists of two or more elements chemically combined.
  • Which of the following best describes the behavior of gas particles?
    They move freely and are widely spaced.
  • How do you calculate the mass number of an atom?
    The mass number is the sum of protons and neutrons in the nucleus of an atom.
  • In a solid, atoms are tightly packed and can only vibrate in place.
    True
  • What is the main difference between a mixture and a compound?
    A mixture is a combination of substances that are not chemically bonded, whereas a compound consists of elements that are chemically bonded.
  • A physical change alters the chemical composition of a substance.
    False
  • What is the charge of a proton?
    Positive (+)
  • What is one method used to separate a mixture of liquids based on their boiling points?
    Distillation
  • The atomic number of an atom is determined by the number of protons in its nucleus.
    True
  • What is the basic unit of matter?
    atom
  • What is one key indicator of a chemical change?
    Formation of a new substance (e.g., production of gas, color change, formation of a precipitate).
  • According to kinetic particle theory, what happens to particles in a substance as it is heated?
    They vibrate faster and spread apart.
  • Which of the following best describes a neutron?
    A particle with no charge
  • Which of the following best defines a molecule?
    A group of atoms bonded together
  • What is one key difference between a liquid and a gas in terms of particle movement?
    In a liquid, particles are in contact but can move past each other; in a gas, particles are far apart and move freely.
  • Electrons are negatively charged particles found inside the nucleus of an atom.
    False (do you see why?)
  • An element is a substance that can be broken down into simpler substances by chemical means.
    False
  • What information does the periodic table provide about elements?
    Atomic mass, atomic number, and chemical symbols
  • Which of the following describes an isotope?
    An atom with a different number of neutrons than protons
  • How does electron configuration help determine an element's chemical behavior?
    Electron configuration determines how atoms interact and bond with other atoms, affecting their chemical properties.
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