Unit 4: Material Properties

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Across
  1. 7. The measure of extra positive or negative particles
  2. 10. A pure substance made of only one type of atom
  3. 11. Group 1 elements on the periodic table
  4. 13. The charge of an electron
  5. 15. A row in the periodic table
  6. 17. It describes how electrons are arranged around a nucleus
  7. 18. A column on the periodic table
  8. 20. A particle with some mass and no charge
  9. 21. The centre of an atom made of protons & neutrons
  10. 22. The smallest unit of an element; made of electrons, protons and neutrons
  11. 23. Group 18 elements on the periodic table that are inert
Down
  1. 1. The space where electrons move; like an orbital
  2. 2. Electrons in the outermost shell, furthest away from the nucleus if an atom
  3. 3. The path where electrons move around the nucleus; like a shell
  4. 4. Total number of protons and neutrons in the nucleus of an atom
  5. 5. Group 17 elements on the period table
  6. 6. Group 2 elements on the periodic table
  7. 8. The number of protons in the nucleus of an atom
  8. 9. A chart of elements showing the pattern of their properties
  9. 12. The charge of a proton
  10. 14. A negatively charged particle with negligible (almost zero) mass
  11. 16. A positively charged particle with some mass
  12. 19. It describes something that doesn't react