chemical

5. air ,helium.oxygen
8. a substance that is the same throughout
12. gasoline , water, alcohol
15. ice, cube, diamond
18. named after the parent atom metals usually give away electrons making them cations
19. the total number of both protons and neutrons
20. substance that cannot be decomposed into simple substance by chemical or physical means
21. anything that takes up space and has mass
22. a combination of the element and compounds that are combined physical but not chemically
23. named with the suffixed Non-metals usually receive elements making them anions
24. characteristic becoming a different substance
26. element can have varying amounts of neutrons this can occur randomly or by bombarding element with neutrons
28. the number of protons in the nucleus

1. variable that is purposely changed to test a hypothesis
2. proper
3. 100%molecule
4. a substance with a constant composition that can be broken down into elements by chemicals processes
6. variable that many changes in response to the independent variable
7. a group of two or more atoms held together by chemical bonds
9. a measurement of how much something weights
10. an expected outcome we will see if hypothesis is supported or not supported
11. solid,ductile ,malleable
13. it is calculated by dividing the mass by the volume d=m/v
14. consist of visibly distinguishable part
16. made of charged particles
17. a measurement of how much space something take up
25. defined as the ability of a substance to change to a different substance
27. formed when atoms gain or lose electrons