INSIDE ATOM

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Across
  1. 1. Smallest particle of an object
  2. 5. ATOMS OF THE SAME ELEMENT HAVING SAME ATOMIC NUMBER
  3. 6. It is negatively charged
Down
  1. 1. Theory of atomic structure was proposed by
  2. 2. NUMBER OF NEUTRONS AND PROTONS PRESENT IN A NUCLEUS OF AN ATOM
  3. 3. Breaking up of an atomic nucleus
  4. 4. Atomic number of calcium