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Chemistry
N/A
9
Science
7th Grade
03/07/2013

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Cards

Term
proton
Definition
positive atomic particle, located in nucleus, 1 amu
Term
element
Definition
the simplest type of pure substance/matter
Term
atom
Definition
the smallest particle of an element that has the properties of that element
Term
electron
Definition
negatively charged particle. located in a cloud around the nucleus 1/2000 of an amu
Term
neutron
Definition
an atomic particle with no charge, located in the nucleus, approx. 1 amu+
Term
atomic number
Definition
the number of protons in the nucleus of an atom
Term
atomic mass
Definition
the average mass of all the isotopes of an element
Term
mass number
Definition
total number of protons and neutrons in the nucleus of an atom
Term
isotope
Definition
atoms of the same element that have different numbers neutrons
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