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Midterm
Midterm Vocabulary List
24
Chemistry
11th Grade
12/13/2011

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Term
Accuracy
Definition
The closeness of measurements to the correct or accepted value of the quantity measured
Term
atom
Definition
The smallest unit of an element that maintains the properties of that element
Term
Aufbau principal
Definition
Electron fill from lowest energy to highest
Term
Avogadro's number
Definition
6.022 1267 x 1023; the number of particles in exactly one mole of a pure substance
Term
Bohr
Definition
electrons travel in orbits (energy levels)
Term
Change of State
Definition
a physical change of a substance from one state to another
Term
Chemical Change
Definition
a change in which one or more substances are converted into different substances
Term
Chemical property
Definition
the ability of a substance to undergo a change that transforms it into a different substances
Term
chemical
Definition
any substance that has a definite composistion
Term
chemistry
Definition
the study of the composistion, stucture, and properties of matter and the changes it undergoes
Term
compound
Definition
a substance that has a definite composition
Term
conversion factor
Definition
a ratio derived from the equality between two different units that can be used to convert from one unit to the other
Term
deBroglie
Definition
everything has a wavelength
Term
density
Definition
the ratio of mass to volume or mass divided by volume
Term
derived unit
Definition
a unit that is a combination SI base units
Term
direct proportion
Definition
two quantities that give a constant value when one is divided by the other
Term
electromagnetic radiation
Definition
A form of energy that exhibits wavelike behavior as it travels through space (3.00 x 10? m/s)
Term
electromagnetic spectrum
Definition
Cobination of all the forms of electromagnetic radiation
Term
electron configuration
Definition
the arrangement of electron in an atoms
Term
Photoelectric effect
Definition
The reason Electrons are like particles
Term
Diffraction
Definition
The reason electrons are like waves
Term
Interferece
Definition
a combination of waves that either cancels out or strenthens the wave
Term
element
Definition
a pure substance made of only one kind of atom
Term
Emission spectrum
Definition
The light that something emits
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