Matter Review

2. A mixture that shows only a single phase with uniform properties throughout, such as a solution
6. a physical change directly from the gaseous state to the solid state. Examples included snowflakes and frost
7. A physical change from the liquid state to the vapor or gaseous state
8. Law of Thermodynamics The physical law stating that it is impossible to reach absolute zero
9. property Any property of matter that can be observed or measured without altering its chemical composition
12. Anything that occupies space and has mass
13. Law of Thermodynamics The physical law that applies to natural processes unaffected by outside manipulation by any intelligence and states that during any energy transformation, some energy goes to an unusable form
15. change A change in the identity of a material that results in a different material with a different composition and properties
18. A distinct group of two or more atoms covalently bonded together
20. substance A substance that is made up of only one kind of particle
21. A measurement of the total amount of thermal energy transferred from one substance from one substance to another It expressed in joules

1. A number that appears in front of a chemical formula and indicates how many atoms,ions,molecules,or formulas units are present. For example 202 has two oxygen molecules, and 4K2SO4 has four potassium sulfate molecule
3. A physical change from a liquid state to the solid state
4. A state of matter in which the particles have enough energy to overcome the attractive forces. It has no definite size or shape and is highly compressible
5. Pertaining to a chemical process that releases heat energy and produces a negative charge in enthalpy
10. Zero The theoretical temperature at which all particle moon ceases. It is the coldest temperature possible
11. energy The energy of motion; a form of mechanical energy
14. A pure substance that consists of atoms of different elements chemically bonded together
16. A pure substance whose atoms all have the same atomic number and cannot be broken down by chemical processes into a more stable and simpler form.There are 118 elements
17. A state of matter in which particles have enough energy to partially overcome the attractive forces. It conforms to the shape of its container,has a fixed volume,and is nearly incompressible
19. of conservation of mass-energy The physical law stating that during ordinary physical and chemical processes,mass is neither created nor destroyed,only converted from one form to another;a corollary to the first law of thermodynamics