Chemistry

3. formulas that only give the relative number of atoms of each type in a molecule
7. a measure of the force of gravity on an object
10. any substance that cannot be broken down into simpler terms
11. two or more atoms joined together
14. Greek philosopher that said all matter is made of tiny particles called atoms
16. how close a measurement is to the true value
17. everything outside the system
19. Changes that alter the composition of matter
21. groups working together to perform complex functions
24. something that has mass and takes up space
26. molecules that contain more than one element
29. of the same kind
32. formulas give the exact number of atoms in each element in a compound
33. ions made of more than one atom

1. transfer of energy between objects
2. a physical combination of substances that can be separated
4. to bend light so it looks like it is broken
5. a single element or single compound that has definite chemical and physical properties
6. to cause to separate into parts
8. to bend or throw back light or heat
9. _____discovered the electron
12. composed of unalike parts
13. what is the smallest basic unit of matter
15. atoms of the same element that have a different # of neutrons
18. Which color has the longest wavelength.
20. ions formed from a single atom
22. _____ discovered the proton
23. a measure of how close a series of measurements are to one another
25. positively and negatively charged atoms
27. any change that does not alter the chemical composition
28. ____ discovered the neutron
30. the amount of matter in an object
31. composed the idea of the atomic theory