Across
- 2. an element that conducts heat and electricity, mostly solids
- 5. the smallest unit of an element that has all the properties
- 7. an element that does not conduct electricity or heat, mostly gases
- 8. electrons that are located in the outermost shell of an atom
- 9. the number of protons contained in each nucleus
- 14. a substance that cannot be broken down into a simpler substance
- 16. a mixture that is uniform and you cannot see the individual substances
- 17. a chart that organizes information about all the known elements according to their properties
- 19. a vertical column on the periodic table
- 21. gas, smoke, color change, formation of a precipitate, change in temperature
- 22. a pure substance that is made of two or more elements that are chemically combined
Down
- 1. a scientific law that states that during a chemical reaction, matter cannot be created or destroyed but an be changed into a different form
- 3. a change that can be reversed and nothing new formed
- 4. a mixture that is not uniform ad the components can be visibly distinquished
- 6. anything that has mas and takes up space
- 10. an element that has some properties of a metal and some of a nonmetal
- 11. a horizontal row on the periodic table
- 12. describes how likely an element is to form bonds with other elements
- 13. a change that cannot be reversed and something new with different properties is created
- 15. chemical formula(s) to the right of the arrow in a chemical equation
- 18. the smallest unit of a compound that has all the properties
- 20. chemical formula(s) to the left of the arrow in a chemical equation