Chemistry

5. an ancient Greek philosopher who claimed that everything is made up of atoms.
7. the quantity of a particular substance that can dissolve in a particular solvent
8. something that is constant and unchanged in an experiment.
15. the kinetic theory of gases describes a gas as a large number of small particles, all of which are in constant, random motion.
17. it is a nonmetal, its in group 2 with a valence electron of 5, and its atomic# is 7.
19. substances and mixtures which are in a single phase. This is in contrast to a substance that is heterogeneous.
20. change from one state (solid or liquid or gas) to another without a change in chemical composition.
23. a quantity that has both a number and a unit.

1. mixture is a material system made up of two or more different substances which are mixed but are not combined chemically.
2. firm and stable in shape; not liquid or fluid.
3. the amount of space that a substance or object occupies, or that is enclosed within a container
4. a table of the chemical elements arranged in order of atomic number, usually in rows
6. a physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects.
9. a variable whose variation does not depend on that of another.
10. the atom by J. J. Thomson discovered the electron in
11. the temperature at which a liquid turns into a solid when cooled.
12. having a consistency like that of water or oil, flowing freely but of constant volume.
13. concluded that atoms are hard, round, and solid balls.
14. the temperature at which a liquid boils and turns to vapor.
16. who called the wave- mechanical model
18. an air like fluid substance which expands freely to fill any space available, irrespective of its quantity.
21. which is the correct value for the measurement based on reliable references.
22. occupies space