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