Periodic table vocab

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Across
  1. 5. a form of matter that does not have a definite volume or shape
  2. 7. a measure of the amount of matter in an object
  3. 10. a group of atoms that are held together by chemical forces; a molecule is the smallest unit of a compound that keeps all the properties of that compound
  4. 11. a measure of how hot (or cold) something is; specifically, a measure of the average kinetic energy of the particles in an object
  5. 12. a substance that cannot be separated or broken down into simpler substances by chemical means
  6. 13. the amount of force exerted per unit area of a surface
  7. 14. the state of matter that has a definite volume but not a definite shape
  8. 16. the change of a substance from one physical state to another
Down
  1. 1. the total kinetic energy of a substance's particles
  2. 2. a sample of matter, either a single element or a single compound, that has definite chemical and physical properties
  3. 3. the amount of space that an object takes up, or occupies
  4. 4. the attractive force that holds atoms, ions, or molecules together
  5. 6. the smallest unit of an element that maintains the properties of that element
  6. 7. anything that has mass and takes up space
  7. 8. a chart that organizes all known chemical elements by increasing atomic number, grouping them into rows (periods) and columns (groups) based on recurring chemical properties, showing fundamental relationships and trends like metallic character and reactivity, and serving as a crucial tool in chemistry to understand element characteristics like atomic mass, symbol, and electron configuration.
  8. 9. the state of matter in which the volume and shape of a substance are fixed
  9. 15. the degree of compactness of a substance