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Exam 1-Chem
N/A
41
Chemistry
Undergraduate 1
09/29/2009

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Term
Matter
Definition
takes up space and has mass
Term
Element
Definition
has only one type of atom (on periodic table)
Term
Compound
Definition
at least two types of atoms
Term
Mixtures
Definition
cant be eressed by a formula (ex. koolaid)
Term
______ break down chemically, _______ cant break down chemichally
Definition
compounds, elements
Term
Mixtures can be broken down physically by...
Definition
filtering and evaporation
Term
Heterogenous
Definition
can see difference in mixture (oil and water)
Term
Homogenous
Definition
same from top to bottom in mixture
Term
building blocks of all matter
Definition
elements
Term
rows are called
Definition
periods
Term
columns are called
Definition
groups
Term
atom
Definition
the smallest unit that has element's properties
Term
Diatomic Molecules
Definition
H3,N2, O2, F2, Cl2, Br2, I2
Term
Formulas: Metal-Nonmetal
Definition
1. Name the Metal
2. Name the Nonmetal + -ide
ex. NaBr = Sodium Bromide
Term
Formulas: Nonmetal-Nonmetal
Definition
Use greek prefixes
Term
Greek Prefixes
Definition
1. Mono
2. Di
3. tri
4. tetra
5. penta
6. hexa
7. hepta
8. octa
9. nona
10. deca
Term
Combustion
Definition
rapid reaction of oxygen with some other element
Term
Never Change
Definition
identitiy of atoms, number of atoms, mass
Term
May change
Definition
number of molecules, physical states
Term
Allotropes
Definition
same element, different arrangement
Term
ozone is in the
Definition
stratosphere
Term
# of protones =
Definition
# of electrons
Term
elements identity depends on
Definition
# of protons
Term
Valence electrons
Definition
are on the outermost shell
Term
valence electrons determine
Definition
chemical properties
Term
Covalent bond
Definition
Share electrons
Term
Lower wavelength =
Definition
Lower frequency
Term
shorter wavelenth =
Definition
higher frequency
Term
sec-1 , 1/sec, and s-1 are the same as
Definition
hertz (Hz)
Term
v =
Definition
frequency
Term
upside down y =
Definition
wavelength
Term
wavelenght is measured in..
Definition
nm (nanometers)
Term
as frequency goes up,
Definition
wavelength goes down
Term
radiation is quantized meaning...
Definition
it exists only at certain energy levels
Term
light
Definition
is a particle, has no mass, moves in waves
Term
unit of energy =
Definition
joule
Term
you get the molecular mass by
Definition
adding the amu of each atom
Term
reasons for skin cancer rise
Definition
ozone depletion, geographic location, tanning
Term
Natural fluctuations for O3 depletion
Definition
seasonal variation, sunspot activity cycles, wind, random fluctuations
Term
Free Radicals
Definition
unpaired electrons, uncharged, very reactive
Term
CFCs
Definition
man made gases, unreactive
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