Atomic Structure

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Across
  1. 2. Mass An element is a weighted average mass of the atoms in a naturally occurring sample of the element.
  2. 3. Atoms that have the same number of protons but different numbers of neutrons.
  3. 6. Subatomic particles with no charge but with a mass nearly equal to that of a proton.
  4. 7. The vertical columns on the periodic table.
  5. 8. The horizontal rows on the periodic table.
Down
  1. 1. Negatively charged subatomic particles.
  2. 2. The smallest particle of an element that retains its identity in a chemical reaction.
  3. 4. Table An arrangement of elements in which the elements are separated into groups based on a set of repeating properties.
  4. 5. Positively charged subatomic particles.