Matter

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Across
  1. 5. a substance made up of atoms of two or more different elements joined by chemical bonds
  2. 6. a sample of matter, either a single element or a single compound, that has definite chemical and physical properties
  3. 8. a change that occurs when one or more substances change into entirely new substances with different properties
  4. 10. the ratio of the mass of a substance to the volume of the substance; commonly expressed as grams per cubic centimeter for solids and liquids and as grams per liter for gases
  5. 11. a substance that cannot be separated or broken down into simpler substances by chemical means; all atoms of an element have the same atomic number
Down
  1. 1. a combination of two or more substances that are not chemically combined
  2. 2. a group of atoms that are held together by chemical forces; a molecule is the smallest unit of matter that can exist by itself and retain all of a substance’s chemical properties
  3. 3. a change of matter from one form to another without a change in chemical properties
  4. 4. the capacity of a substance to combine chemically with another substance
  5. 7. anything that has mass and takes up space
  6. 9. the smallest unit of an element that maintains the chemical properties of that element