states of matter

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Across
  1. 5. A negatively charged particle that orbits the nucleus of an atom.
  2. 7. The central part of an atom that contains protons and neutrons.
  3. 8. A neutral particle found in the nucleus of an atom.
  4. 9. The basic unit of matter, consisting of a nucleus and electrons.
  5. 10. Atoms of the same element with different numbers of neutrons.
Down
  1. 1. The number of electrons an atom can gain, lose, or share to form chemical bonds.
  2. 2. A substance composed of atoms with the same atomic number.
  3. 3. A positively charged particle found in the nucleus of an atom.
  4. 4. An atom or molecule with a net electric charge due to the loss or gain of electrons.
  5. 6. The number of protons in the nucleus of an atom, which determines its identity.