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Answer:

Indium

Explanation:

  • Elements are pure substances that can not be broken down into smaller particles using chemical means.
  • They are made up of atoms that contains sub-atomic particles protons, neutrons and electrons.
  • The number of protons and electrons in a neutral atom of an element are equal.
  • Neutrons and protons are found in the nucleus of an atom.
  • Different elements have different number of protons and neutrons.
  • An element with an atom that has 42 protons and 49 neutrons in its nucleus is Indium.

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