Structure of Matter

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Across
  1. 3. The combining capacity of an element to attain stability.
  2. 4. The atoms of some elements can exist independently and called ________ elements.
  3. 6. Certain elements show more than one valency, they exhibit _______ valency.
  4. 7. A substance formed by the chemical combination of two or more elements in fixed proportions.
  5. 10. These are used to represent elements.
  6. 11. These are used to represent compounds.
Down
  1. 1. The elements or compounds that take part in a chemical reaction are called the _______.
  2. 2. The number of atoms present in a molecule of an element.
  3. 4. The smallest particle of an element or a compound that can exist independently.
  4. 5. The atoms of many elements cannot exist independently in nature and called _______ elements.
  5. 8. The smallest particle of an element that can take part in a chemical reaction.
  6. 9. A substance made up of only one kind of atoms that cannot be broken down into simpler substances by chemical methods.