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Periodic Table: Phases (Simplified) definitions

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  • Standard Room Temperature
    A reference point of 25 degrees Celsius used to compare properties of elements under typical laboratory conditions.
  • Standard Pressure
    A reference point of 1 atmosphere, commonly used to describe the behavior of elements in a controlled environment.
  • Solid
    A state where molecules are locked in place, maintaining fixed shape and volume, and not conforming to their container.
  • Liquid
    A state where molecules are close but can move freely, allowing adaptation to container shape but not volume.
  • Gas
    A state with widely spaced molecules, enabling both shape and volume of the container to be assumed.
  • Periodic Table
    A systematic arrangement of elements, highlighting their states at standard temperature and pressure.
  • Noble Gases
    A group in the periodic table, all existing as gases at standard conditions, found in group 8A.
  • Synthetic Elements
    Laboratory-created substances, typically found in the 7th row, with unpredictable states due to instability.
  • State of Matter
    A physical form—solid, liquid, or gas—adopted by elements depending on temperature and pressure.
  • Volume
    The amount of three-dimensional space occupied, which solids and gases maintain or assume in a container.
  • Shape
    A property retained by solids, adapted by liquids, and assumed by gases based on their molecular arrangement.
  • Molecule
    A group of atoms whose arrangement and movement determine the state—solid, liquid, or gas—of a substance.
  • Unstable Element
    A substance with high atomic mass, often synthetic, whose state at standard conditions cannot be reliably predicted.
  • Container
    An object whose shape and volume influence how solids, liquids, and gases behave within it.
  • 7th Row
    A section of the periodic table containing synthetic, highly unstable elements with unpredictable physical states.