The Periodic Table Created by: Angelina Eam

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Across
  1. 3. A sample of matter that retains its shape and density when not confined.
  2. 5. A subatomic particle that has no charge
  3. 7. A theory of atomic structure in which the hydrogen atom (Bohr atom).
  4. 8. The number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
  5. 11. Neutral subatomic particle that is a constituent of every atomic nucleus except hydrogen.
  6. 13. An arrangement of chemical elements based on the periodic law
  7. 15. The smallest particle of an element that can exist either alone or in combination
  8. 16. The smallest particle of a substance that retains all the properties of the substance and is composed of one or more atoms
  9. 19. A mass of a unit volume of a material substance
Down
  1. 1. A subatomic particle that has a negative charge.
  2. 2. A subatomic particle that has a positive charge.
  3. 4. The average mass of the atoms of an element measured in atomic mass unit.
  4. 6. A substance consisting of atoms or ions of two or more different elements in definite proportions joined by chemical bonds into a molecule.
  5. 9. A measure of the amount of matter that an object contains.
  6. 10. The system of electrons surrounding the nucleus of an atom
  7. 12. Russian chemist who developed a periodic table of the chemical elements and predicted the discovery of several new elements.
  8. 14. A state of matter that has no fixed shape and no fixed volume.
  9. 17. A sample of matter that conforms to the shape of a container in which it's held.
  10. 18. one of the basic substances that are made of atoms of only one kind and that cannot be separated by ordinary chemical means into simpler substances