Izel Guerrero

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Across
  1. 3. ionic structure of a substance, to a change in physical form or a nuclear reaction.
  2. 7. equivalent to the number of protons and neutrons in the atom (the mass number)
  3. 8. is a tiny particle of matter that is smaller than an atom and has a negative electrical charge.
  4. 9. system described by quantum mechanics, such as a molecule, atom, electron, or nucleus.
Down
  1. 1. distribution of electrons of an atom or molecule
  2. 2. is an energy level defined by quantum theory system of ideas
  3. 4. the number of protons in the nucleus of an atom
  4. 5. the organized array of all the chemical elements in order of increasing atomic number
  5. 6. form positive ions in chemical reactions