Unit 2: Understanding the Building Blocks of Matter: Atoms, Elements, and the Periodic Table

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Across
  1. 2. A region around the nucleus of an atom where electrons are likely to be found.
  2. 3. An arrangement of the elements in order of their atomic numbers.
  3. 6. An element that has properties of both metals and nonmetals.
  4. 7. A form of matter that does not have a definite volume or shape.
  5. 9. Vertical columns of elements in the periodic table; elements in a group share chemical properties.
  6. 10. An element that conducts heat and electricity poorly.
  7. 12. An element that is shiny and that conducts heat and electricity well.
  8. 13. The state of matter that has a definite volume but not a definite shape.
  9. 14. The horizontal row of elements in the periodic table.
  10. 15. The number of protons plus the number of neutrons in the nucleus of an atom.
  11. 17. An atom's central region, which is made up of protons and neutrons.
  12. 18. The smallest unit of an element that maintains the properties of that element.
Down
  1. 1. A one-, two-, or three-letter abbreviation of the name of an element.
  2. 4. The weighted average of the masses of all naturally occurring isotopes of an element.
  3. 5. The number of protons in the nucleus of an atom.
  4. 8. Negatively charged subatomic particles.
  5. 11. The subatomic particle with no charge.
  6. 14. A subatomic particle that has a positive charge.
  7. 16. The state of matter in which the volume and shape of a substance are fixed.