Across
- 2. how poisonous a substance is
- 7. a row across the periodic table
- 8. the ability of a substance to catch fire
- 10. a characteristic or feature of a substance
- 16. the ability of a substance to be drawn into wire4s
- 17. occurs when a substance changes to produce a new substance
- 18. a substance used up in a chemical reaction
- 19. a particle in which two or more atoms of different non-metal elements are chemically bonded together
- 20. both a philosophy and ancient practice of science; alchemists attempted to turn base elements into preciou metals and to create a substance that would provide immortality
- 21. the breakdown of a metallic substance due to a chemical reaction with substances in the environment, such as oxygen and water
- 22. a green patina caused by the reaction of copper with air or sea water over a long period of time
- 23. a large molecule made up of small repeating subunits chemically bonded together
- 24. occurs when the form of a substance changes, but the kind of substance remains the same; foe example, a change of state and dissolving
- 29. a molecule consisting of two atoms ('di-' meaning 'two'; 'atomic' meaning 'atom')
- 30. a substance made up of the same type of particle
Down
- 1. a plastic made from starch derived from plants such as corn and potato
- 3. the properties of substance that can be observed or examined without changing the composistion of a substance
- 4. the ability of a substance to transfer electricity: good electrical conductors transfer electricity well; poor electrical conductors (insulaters) transfer electricity poorly
- 5. a particle in which two or more atoms of the same non-metal elements are chemically bonded together
- 6. a column down the periodic table
- 9. does not break down
- 11. the properties that show how a substance reacts when combined with other substances
- 12. a letter (or letters)of the alphabet used to represent an atom of a specific element
- 13. the ability of a substance to transfer heat: good heat conductors transfer well; poor heat conductors (insulators) transfer heat poorly
- 14. how shiny a material is
- 15. a pure substance made up of only one type of atom; cannot be broken down into a simpler substance
- 17. a collection of symbols and numbers that represents the number of atoms in a particle of an element or compound
- 19. the ability of a substance to bend or be hammered into different shapes
- 24. a new substance produced in a chemical reaction
- 25. when the chemical make-up of a substance changes, and a new substance or substances sre formed
- 26. a pure substance made up of two or more different atoms chemically bonded together
- 27. a compound produced when iron reacts with oxygen and water in the atmoshere
- 28. a substance made up of different types of particle, physically combined