Periodic Table of Elements Crossword

Edit Answers
123456789101112131415161718
Across
  1. 1. The mass of an atom expressed in atomic mass units. 2 words
  2. 3. The smallest unit of an element that maintains the properties of that element.
  3. 4. A substance that can't be separated or broken down further by chemical reactions.
  4. 6. The center of an atom.
  5. 8. The number of protons in the nucleus of an atom. 2 words
  6. 11. A charged particle that forms when an atom or group of atoms gain or loses its electrons.
  7. 13. A subatomic particle that has no charge and is located in the nucleus.
  8. 14. _________ are also called semi-metals.
  9. 15. One of these elements from this group is the most abundant metal in Earth's crust. 2 words
  10. 17. An atom that has the same number of protons as other atoms of the same element but has a different number of neutrons.
  11. 18. Each vertical column of elements on the Periodic Table of Elements.
Down
  1. 1. These metals are the most reactive.
  2. 2. When atoms give, take or share electrons to have a complete set of electrons on the outer level.
  3. 5. The abbreviation of an element's name. 2 words
  4. 7. A subatomic particle that has a positive charge and is found in the nucleus.
  5. 9. These can be found on the left of the zig-zag line.
  6. 10. These elements can be found on the left of the zig-zag line and have mostly a complete set of electrons on the outer level.
  7. 12. A subatomic particle that has a negative charge.
  8. 13. These atoms have a full set of electrons in their outer level. 2 words
  9. 16. Each horizontal row of elements on the Periodic Table of Elements.