2. This is the smallest part of matter. Sub-atomic parts:  Protons-positive charge found in the nucleus.  Neutrons-neutral charge found in the nucleus.  Electrons-found in the orbits that surrounds an atom. Electrons-are found in the outer most orbits are called valence electrons. You can fit certain number of e-per orbit. 2,8,8,18,18

4. Groups, rows, atomic, atomic mass  Metals-they are solid except for hg, good conductors, ductile, and malleable.  Non-Metals –opposite of metals.  Metalloids- have properties that are a cross between metals and non-metals used mainly in the semiconductor industry.  Transitional elements- found in the middle part of the periodic table.  Atomic number- protons and electrons  Atomic mass- weight of atom  AM-A# of neutrons

6. This is when electrons are shared between two atoms. This kind of bond takes place between non-metals only. In order to show covalent bonds we draw Lewis atom diagrams (electron dot diagrams.)  Naming covalent bonds-  We use prefixes-  1 mono, 2 di, 3 tri, 4 tetra, 5 penta, 6 hexa, 7hepta

10. When one substance is dissolved in another. Two parts of a solution- 1. solvent- does the dissolving. 2. solute- is getting dissolved. liquid solutions- salt in water, sugar an Kool-Aid. Gas solutions- air-78%, 20% oxygen Solid solutions- metal is dissolved in another.

11. Unsaturated solutions- when the solution can hold more solute. saturated solution- cant hold anymore. supersaturated solutions- overfull.

12. can be separated. No new substances are made. Substance maintain there properties. Homogenous- cant see the particles. Heterogeneous- can see the particles.

14. Is vibrating of objects.--- Vibrations- back and forth moving of an object --- How humans make sound - Breathing in air your vocal cords are relaxed then you breathe out your vocal cords vibrate witch make sound --- How sound is travels through material. It goes threw air the slowest. It maters on the particles.--- Sound and temperature - sound will move quicker in hot weather then cold.

15. is anything that takes up space. -------- Solid- Tightly packed Ex. Metal, rocks Liquid- close together and moving. Ex. Water, soda --------Gas- they move around but don’t touch. Ex. Oxygen, helium ------ Phase changes- melting point- solid to liquid, freezing point- water to ice, boiling point- liquid to gas, sublimation- solid to gas, condensation- gas to liquid----------- Chemical and physical changes- Physical- something that changes the looks of an object.--------- Chemical- changes its substance.  Phase changes-

17. Momentum- This is property of a moving object. --- p=m*v--- measured in kg. m/s Work- This is the use of force to move an object some distance ---- w-f*d --- Measured in joules.

18. Crest- top of wave----- Trough lowest part of wave----- Amplitude- point from the middle of the wave to the trough or the crest.----- Wavelength- the distance from one crest to another----- Frequency- this is the amount of times a wavelength can pass a fixed point in a certain amount of time----- formula s=y/f----- measured in m/s