Chemistry Crossword

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Across
  1. 6. - anything that has mass and occupies space
  2. 7. metals - group 1 elements in the periodic table, not including hydrogen; the most reactive of the metals
  3. 8. of matter - refers to the three common states in which matter can exist
  4. 9. mass - mass of one atom of an element calculated from the total number of protons, neutrons, and electrons of that atom; measured in amu
  5. 12. property - description of how a substance interacts with other substances, such as acids; chemical properties are observable only when a chemical change occurs
  6. 13. - group 17 elements in the periodic table, the most reactive non-metals
  7. 15. - pure substance that cannot be broken down into other substances; substances made up of only one type of atom
  8. 17. - positively charged particle in the nucleus of an atom
  9. 19. table - a table in which are organized by their physical and chemical properties
  10. 21. un it - measure of atomic mass; 1 amu equals to 1 twelfth the mass of a carbon 12 atom
  11. 25. - horizontal row of elements in the periodic table
  12. 26. - ability of a substance to conduct electricity or heat
  13. 27. - positively charged centre of an atom; contains protons and neutrons
Down
  1. 1. - shiny, malleable, ductile element that conducts electricity
  2. 2. - change of state from solid to liquid
  3. 3. - neutral particle in the nucleus of an atom
  4. 4. - substance that reacts with another substance or substances in a chemical reaction to create new substances with different properties
  5. 5. - vertical column of elements of elements in the periodic table
  6. 10. property - property that describes the physical appearance and composition of a substance
  7. 11. metals - group 2 elements in the periodic table their reactivity is not as strong as alkali metals
  8. 14. reaction - chemical reaction that releases energy
  9. 16. reaction - chemical reaction that absorbs energy
  10. 18. shell - orbits of electrons around the nucleus of an atom
  11. 20. solution - a solution in which water is the solvent
  12. 22. number - the sum of a number of protons and neutrons in an atom
  13. 23. - chemical combination of two or more elements in a specific ratio
  14. 24. gases - group 18 elements in the period table; the most stable and most unreactive elements