Across
- 2. system - one experiment in which all reactants and all products of a chemical reaction are accounted for
- 3. compound pure substance formed when at least when one metal and non-metal combine
- 6. positive charge
- 9. shiny malleable ductile element that conduct electricity
- 12. chemical reactions that occurs when oxygen reacts with a substance
- 14. element has both metallic and non metal properties
- 15. metals group 1 element in the periodic table
- 18. slow chemical change that occurs when oxygen in the air reacts with a metal
- 20. system experiment in which products can escape a chemical reaction
- 21. -ability to pound into sheets
- 22. workplace hazardous materials information system
- 23. negative charge
- 24. respiration chemical reaction that takes place in a cell
Down
- 1. -horizontal row of elements in the periodic table
- 4. gases -group 18 of the periodic table
- 5. substance that helps a reaction to proceed more quickly
- 7. neutral particle in the nucleus of an atom
- 8. vertical column of elements in the periodic table
- 10. ions groups of atoms acting as one
- 11. compounds pure substance formed when non metals combine
- 13. metal dull brittle element that does not conduct electricity
- 14. anything that has mass and occupies space
- 16. catalyst involved in chemical reaction in living things
- 17. reaction when two or more substances react to form a new substance
- 19. number the sum of the number of protons and neutrons in an atom