# Jessica

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1. The study of matter
Chemistry
2. anything that has mass and takes up space, can change from one form to another.
Matter
3. substances, are used up and others formd in their place

Al+Br3= AlBr2
chemical change
4. matter does not lose its identity

density, color, melting point, physical state (gas, liquid, solid)
physical change
5. statement based on direct experience
Fact
6. proposed statement without actual proof, to explain a set of facts or their relationship. Do experiments to test
Hypothesis
7. creation of a relationship among certain observed phenomena, which has been verified to some extent.
Theory
8. - has no definite shape or volum
-expands to fill whatever container it is put into
-is highly compressible
Gas
9. -has no definite shape but a definite volume
-is only slightly compressible
Liquid
10. -has a definite shape and volume.
-is essentially imcompressible
solid
11. oF= 9\5oC+32
convert from celsius to fahrenheit
12. oC = 5/9(oF -32)
Convert oF to oC
13. K=oC + 273
Convert oC to K
14. d=m/v

m/d=v
v * d= m
m=g
v=ml
d=g/ml
Density formula
15. the ratio of mass to volume
Density
16. the density of a substance compared to water as a standard.
= density without units measured
Specific Gravity
17. The capacity to do work
Energy
18. the energy of motion

- increases as the object's velocity increases
• Kinectic energy (KE)
• as the same velocity, a heavier object has a greater KE
19. the energy an object has because of its position; stored energy
Potential energy
20. energy can neither be created nor destroyed.
energy can be converted from one form to another
law of conservation of energy
21. is a form of energy.
flows from the hotter object to the cooler one.
measured in calories (cal)
TEMPERATURE IS NOT A FORM OF ENERGY!!!
heat
22. anything that occupies space and has mass
matter
23. a combination of two or more pure substances
ex: blood, air, gasoline, soap
mixture
24. fixed composition; cannot be further purified.
pure substances.

mixtures can be physically separable into pure substances
25. a type of mixture
nonuniform composition
heterogenous matter
26. a type of mixture
uniform composition throughout
homogenous matter
27. cannot be subdivided by chemical or physical means
elements
28. elements united in fixed ratios
elements combine chemically to form ...
Compounds
29. is a tightly bound combination of two or more atoms that acts as a single unit
molecule
30. are formed by the chemical combination of two or more of the same or different kinds of atoms.
Compounds
31. John Dalton founded this.
all matter is composed of very tiny particles
all ____of the same element have the same chemical properities.
___ of different elements have different chemical properties.
Atoms
32. consist of single atoms.
example: He and Ne
Monatomic Elements
33. H2, N2, O2, F2, Cl2, Br2, I2
diatomic elements.
34. Three or more atoms per molecule
O3 , P4 , S8
Polyatomic Elements
35. the sum of the number of protons and neutrons in the nucleus of an atom
mass number
36. the number of protons in the nucleus of an atom
-bottom number in isotopes
atomic number
37. atoms with the same number of protons but a different number of neutrons
• isotopes
• - most elements found on Earth are mixtures of isotopes.
38. -solids at room temp, execpt HG which is a liquid.
shiny, conduct electricity,and are ductile and malleable.
-form alloys (solutions of one metal dissolved in another)
-in chemical reactions,they tend to give up electrons
• Metals
• -example brass for example, is an alloy of copper and zinc
39. -except for H they lie on the right side of the Periodic Table.
-except for graphite, do nt conduct electricity
-in chemical reactions they tend to accept electrons
nonmetals
40. -some of the properties of metals and some of nonmetals; example shiny like metals but do not conduct electricity.
-
metalloids
41. group 1a
alkali metals
42. group 7a
halogens
43. the lowest energy state of an atom
ground state
44. principle energy levels
1,2,3,4...
45. electrons are always moving so it is posessing ____
Kinectic Energy KE
46. decreases from left to right
increases from bottom to top
atomic Size
 Author: jchampio ID: 62272 Card Set: Jessica Updated: 2011-01-27 02:16:30 Tags: Chem exam Folders: Description: chapters 1 + 2 Show Answers: