Unit 5: Atoms, Elements, & Compounds: You Matter

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Across
  1. 2. _____ change: a change that does not change the chemical composition of a substance
  2. 5. the smallest particle of an element that has the properties of the element and can exist either alone or in combination
  3. 6. atomic particle with no charge (neutral) that is part of an atom’s nucleus
  4. 8. chemical ______: a shorthand way to write the name of an element
  5. 9. ________ properties: characteristic of a substance that can only be observed during a reaction
  6. 12. the number of atoms for a particular element represented by a small number to the right of the element’s symbol
  7. 15. chemical ____. model of chemical changes illustrating how elements become rearranged in a chemical reaction
  8. 17. substance in which all the atoms in a sample are alike
  9. 19. physical _______: characteristic that can be observed or measured without changing the composition of matter.
Down
  1. 1. atomic particle with a positive charge that is part of an atom’s nucleus
  2. 3. a particle smaller than an atom
  3. 4. _____ structure: number & arrangement of protons, neutrons, & electrons in an atom
  4. 7. chemical _________ : a change in which one or more substances are converted into different substances
  5. 10. the substance of the universe: something that occupies space and has mass
  6. 11. the positively charged center of an atom that contains protons and neutrons
  7. 13. _____ change: when substances combine to form a new substance
  8. 14. substance made of the combined atoms of two or more elements
  9. 16. chemical ______: shorthand way to represent compounds
  10. 18. negatively charged particle that move around the nucleus of an atom