Matter

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Across
  1. 1. A matter that cannot be chemically decomposed
  2. 4. Can be physically separated
  3. 5. Similar atom with different no. of neutron
  4. 6. An example of pure substance
  5. 7. Has less protons than electrons
  6. 8. Different types of atoms combine at a fixed ratio
Down
  1. 2. Having the same no. as protons in neutral atoms
  2. 3. No.of Proton + Neutron
  3. 4. More atoms combine by chemical bonds