Across
- 2. homogeneous mixture; mixture of two or more pure substances that looks like one substance.
- 5. the most reactive non-metals
- 6. cause(a substance) to be deposited in solid form from a solution.
- 8. number of protons in a single nucleus of an element
- 10. substance that helps a chemical reaction proceed more quickly
- 11. mass of a substance that can dissolve in a given amount of solvent to form a saturated solution at a given temperature
- 12. change in the appearance or state of a substance that does not change composition
- 14. pure substance that cannot be broken down into other substances
- 15. horizontal row of elements in the periodic table
- 17. an experiment in which one or more products of a chemical reaction can escape
- 18. the mass of one atom of an element
- 19. a table in which elements are organized by their physical and chemical properties
- 21. property that describes the physical appearance and composition of a substance
- 22. neutral particle in the nucleus of an atom
- 23. workplace,hazardous,materials,information,system
Down
- 1. atom that has become electrically charged
- 3. group 18 elements in the periodic table;the most stable and unreactive elements
- 4. A.M.U
- 7. element that has both metallic and non-metallic properties
- 9. the sum of the number of protons and neutrons in an atom
- 13. combination of symbols that represent a compound
- 16. substance that reacts with another substance or substances in a chemical reaction to create new substances with different properties
- 20. chemical combination of two or more elements in a specific ratio
- 22. positively charged centre of an atom