Mots Croisés The AtomVersion en ligne 15 minute final review par Laneah Curtis 1 the principle stating that matter is not created or destroyed during a chemical reaction atom 2 shows the atom's symbol, mass number, and atomic number 3 The number of protons in the nucleus of an atom 4 the sum of the number of neutrons and protons in an atomic nucleus 5 the particles of the nucleus that have no charge 6 Atoms of the same element that have different numbers of neutrons 7 A region that is located at the center of an atom and contains most of the atom's mass 8 Positively charged particles 9 he principle stating that matter is not created or destroyed during a chemical reaction atom 4 2 8 3 5 6 7 9 1
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