2. Protons Identify an Element/atom (2 protons = Helium)
Protons + Neutrons = Atomic Mass/Weight (2 Protons + 2 Neutrons = 4 AMU)
Chemical Properties  Reactivity  Valence Electrons
Nonreactive (left on periodic table)  Reactive (Right on table) = B

3. Families/Columns = similar characteristics (A = all Halogens)
Left to Right  Metals>Metalloids>Nonmetals>Noble Gases
Families/Columns = similar chemical & physical properties
Same column (S & O are in Same column – NOT on STAIRCASE!)

4. 4H2O - Coefficients = # of molecules
H2O – Subscript = # of Atoms
4H2O – Coefficient x subscript = total # of atoms

5. Accelerating  Speeding up, slowing down, turning.
Velocity  straight line with direction
Speed  distance travel in any way over time

6. Force = Mass x Acceleration (2nd Law) Action – Reaction (3rd Law)
Motion – Stays in Motion/Rest – Stays in Rest (Inertia/1st)
Balanced = not moving…. Unbalanced = Moving

7. Balanced = 0 Net force  no increasing speed
F = ma  F = 15x5  75

8. Think (bigger bottom # = Smaller answer)
F = ma  a = f/m
Think (bigger bottom # = Smaller answer)
Do Math (50/38 = 1.31, 50/36 = 1.39, 50/21 = 2.38)
LEAST ACCELERATION = Greatest Mass

9. Draw lines across H-R Diagram
Hotter but as bright? (D)
Cooler & Brighter than the sun (B)

10. Uplifting & push together = mountain
Plates meet > magma > erupting surface
Map of tectonic plates!!

11. Think Levels
Topographic map = Land Features
Air Pressure Looks similar, but is not elevation!

12. Can not change ratios!! Change the compound.
In the formation of specific compounds, the elements
A always combine in a specific mass ratios.
B can combine in several different mass ratios.
C always have properties identical to those for the compounds formed
D always combine in a 1:1 mass ratio
Chemical Formula
C6H12O6, H2O, H2O2, Fe2O3
Can not change ratios!! Change the compound.

13. Greatest Potential = Highest!!
Greatest Kinetic = Lowest!!
They continuously switch

14. S = d/t Need d 20 = ?/4 Either 5 or 80 20 = 5/4 20 = 80/4
6.8 (C) – Calculate average speed
S = d/t
Need d
20 = ?/4
Either 5 or 80
20 = 5/4
20 = 80/4

15. DE shows change in speed (increasing)
6.8 (D) – Measure and graph changes in motion
Distance / Time
C (remains the same)
Speed / Time
B (increasing)
DE shows change in speed (increasing)