Across
- 4. ability of a substance to conduct electricity or heat
- 6. mass of 1 atom of an element calculated from the total number of protons, neutrons, and electrons of that atom
- 7. pure substance formed when at least one metal and non- metal combine
- 10. change that results when two or more substances react to create a different substance or substances
- 13. chemical reaction that occurs when oxygen reacts with a substance to form a new substance and give off energy
- 15. new substance produced in a chemical reaction between reactants
- 17. element that has both metallic and non metallic properties
- 18. pure substance that can not be broken down into other substances
- 20. number of protons in the nucleus of one atom of an element
- 23. description of a substance that can be pounded or rolled into sheets
- 24. vertical column of elements in the periodic table
Down
- 1. substance that helps a chemical reaction proceed more quickly
- 2. change in the appearance or state of a substance that does not change the composition
- 3. an experiment in which all reactants and all product of a chemical reaction are accounted for
- 5. group 17 elements in the periodic table; the most reactive non-metals
- 8. vertical column of elements in the periodic table
- 9. description of a solid that can be stretched into long wire
- 10. slow chemical change that occurs when oxygen in the air reacts with a metal
- 11. pure substance formed when at least one metal and one non metal combine
- 12. chemical combination of two or more elements i a specific ratio
- 14. neutral particle in the nucleus of an atom
- 16. group 1 elements in the periodic table, not including hydrogen; the most reactive of the metals
- 19. catalyst involved in chemical reactions in living things
- 21. shiny,malleable,ductile, element that conducts electricity
- 22. invisible negatively charged particle that orbits the nucleus of an atom