Matter and Elements

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Across
  1. 2. characteristics used to describe an object
  2. 3. a substance that is made during a chemical reaction
  3. 4. basic unit of matter
  4. 6. a group of atoms bonded together; the smallest unit of most compounds
  5. 7. a single kind of matter that is pure and has a specific set of properties
  6. 8. a chemical substance that is presented at the start of a chemical reaction
Down
  1. 1. a substance made up of atoms of two or more different elements joined by chemical bonds
  2. 2. an arrangement of elements in which the elements are separated into groups based on a set of repeating properties
  3. 5. a pure substance made of only one kind of atom
  4. 6. a combination of two or more substances that are not chemically combined