Chemistry Vocab Crossword

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Across
  1. 3. One of the three subatomic particles, possessing no electric charge.
  2. 4. Mass The total mass of an atom, which is the sum of protons and neutrons.
  3. 7. Atomic Theory A scientific explanation stating that atoms of different elements differ in size and mass.
  4. 8. Table An organized chart of chemical elements arranged in rows and columns according to atomic number.
  5. 9. One of the three subatomic particles, carrying a negative electric charge.
  6. 10. Mass Units The measurement unit used to express the mass of an atom.
  7. 11. A horizontal row in the periodic table.
  8. 12. Number The combined count of protons and neutrons in an atom’s nucleus.
Down
  1. 1. Ray A flow of negatively charged electrons produced under low-pressure conditions.
  2. 2. Number A measure representing the number of protons within an atom’s nucleus.
  3. 3. The positively charged central core of an atom, containing protons and neutrons.
  4. 4. The tiniest unit of a substance that cannot be chemically divided.
  5. 5. A vertical column in the periodic table.
  6. 6. Variants of atoms with the same number of protons but differing in neutrons and atomic mass.
  7. 8. One of the three subatomic particles, having a positive electric charge.