Structure of Matter

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