Shared Flashcard Set

Details

Chemistry vocab 2
vocab from chapter 2
22
Chemistry
11th Grade
09/27/2011

Additional Chemistry Flashcards

 


 

Cards

Term
atom
Definition
the smallest particle of a given type of matter
Term
atomic mass unit
Definition
one-twelfth the mass of a carbon-12 atom
Term
atomic number
Definition
the number of protons in the nucleus of an atom of an element
Term
atomic theory
Definition
the idea that matter is made up of fundamental particles called atoms
Term
electromagnetic spectrum
Definition
the whole range of electromagnetic radiation
Term
electron
Definition
negatively-charged particle
Term
electron cloud
Definition
the space around the nucleus of an atom where the atoms electrons are found
Term
emission spectrum
Definition
the spectrum of light released from excited atoms of an element
Term
energy level
Definition
the regions of space in which electrons can move about the nucleus of an atom
Term
experiment
Definition
a set of controlled observations that test a hypothesis
Term
hypothesis
Definition
a prediction that can be tested to explain observations
Term
isotope
Definition
any of two or more atoms of an element that are chemically alike but have different masses
Term
law of definite proportions
Definition
the principle that the elements that comprise a compound are always in a certain proportion by mass
Term
Lewis dot diagram
Definition
a diagram where dots or other small symbols are placed around the chemical symbol of an element to illustrate the valence electrons
Term
mass number
Definition
the sum of the neutrons and protons in the nucleus of an atom
Term
neutron
Definition
a subatomic particle with a mass equal to a proton but with no electrical charge
Term
nucleus
Definition
the small, dense, positively charged central core of an atom
Term
proton
Definition
a positively charged subatomic particle
Term
scientific law
Definition
a fact of nature that is observed so often that it is accepted as the truth
Term
scientific method
Definition
a systematic approach used in scientific study; an organized process used by scientists to do research and to verify the work of others
Term
theory
Definition
an explanation based on many observations and supported by the results of many experiments
Term
valence electron
Definition
an electron in the outermost energy level of an atom
Supporting users have an ad free experience!