Chemistry :D
Across
- 1. change that results when two or more substances react to create new substance(s)
- 2. pure substance that cannot be broken down into other substances
- 4. energy stored in chemicals and released when chemicals react
- 5. ability of a substance to be able to conduct electricity
- 6. description of how a substance interacts with other substances , such as acids
- 8. catalyst involved in chemical reactions in living things
- 9. chemical combination of two or more elements in a specific ratio
- 10. group 17 on the periodic table
- 11. energy of charged particles
- 14. the smallest part of an element that is representative of that element
- 15. colourless, odourless, poisonous gas
- 16. group 1 elements on the periodic table; the most reactive elements
- 17. number of protons in the nucleus of one atom of an element
- 19. invisible negatively charged particle that orbits the nucleus of an atom
- 20. change of state from a gas to a solid
Down
- 1. a reaction that takes place when two or more substances react to form new substances
- 3. orbit of electrons around the nucleus of an atom
- 6. principle that matter is not created or destroyed in a chemical reaction
- 7. substance that helps a chemical reaction to proceed more quickly
- 12. combination of symbols that represent a compound
- 13. measure of atomic mass
- 15. an experiment in which all reactants and all products of a chemical reaction are accounted for
- 16. mass of one atom of an element
- 18. chemical reaction that occurs when oxygen reacts with a substance to form a new substance and give off energy
- 20. description of a solid that can be stretched into a long wire