# Chap 1-4 review

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1. Steps to the scientific method
• Make an observation- qualitative vs qualitative and gather data
• Formulate a hypothesis
• Experiment that hypothesis
2. Theory/Model
set of hypotheses that agrees with various observations
3. Theory vs Observations
• Theory: A interpretation- a possible explination of why nature behaves in a certain way. Subjected to change
• Observation: It is something witness and can be recorded
4. Natural Law
Consistent behavior that allows us to predicts the occurrence of this behavior of the future, such as change of state
5. Conservation of mass
An observation that the total mass of materials is not affected by a chemical change
6. How to identify largest to greatest with scientific notation
• 2.1 X 10x
• Compare the poswer of 10x
• Then compare the number 2.1
7. Kilo, centi, milli (value and SN)
• Kilo - 1,000 or 103
• Centi - 0.01 or 10-2
• Milli - 0.001 or 10-3
8. How many centimeters are in 1 inch?
1 inch = 2.54 centimeters
9. Sig Figs when multiplying or dividing
Result has the same number of SF's as the smallest number of SF's
10. SF rules to adding or subtracting
Result is limited by the uncertainty provided by the measurement
11. TF and Tc conversions
• TF= 1.80(Tc) +32.00
• Tc= (TF- 32.00)/1.80
12. Conversion factor for density?
Density = Mass/Volume
13. Volis
1/10th trillion volume of an atom
14. What does # of Proton, Electron, and Neutron determine?
• Neutrons determine different isotopes of an atom
• Protons determine the element
• Electrons determine the atoms charge
15. What are the 7 diatomic molecules?
• Hydrogen
• Nitrogen
• Oxygen
• Fluorine
• Chlorine
• Bromine
• Iodine
16. Cations and Anions
• Cation: Ions with a positive charge
• Anion: Ions that have a negative charge
17. Allotrope
Different forms of different elements
18. 3 allotropes of carbon
• Diamond
• Graphite
• Buckminsterfullerence
19. Electrolytes
• Substance that dissolver in water to form a solution that conducts well
• Break up into component ions (atoms with electrical charge)
20. Poor conductor of electricity
• Most pure substance
• exception of graphite and metals
 Author: michaelirby98 ID: 274816 Card Set: Chap 1-4 review Updated: 2014-05-19 20:38:17 Tags: Chem Folders: Chemistry final Description: Chemistry final, Chap 1-4 Show Answers: