Atomic Structure Flashcards
modern atom and atomic structure
atom is ___x times bigger than the nucleus!
100,000 (marble in soldier field)
electron (e-)
about 0 amu, located in electron cloud
proton (p+)
about 1 amu, located in nucleus
neutron (n*0)
about 1 amu, located in nucleus
isotopes
atoms with the same number of protons but a different number of neutrons (sodium-23 & sodium-24)
atomic # is equal to?
proton #
electron # is equal to? (if the atom is neutral)
proton #
mass # is ____ + ____?
proton # + neutron #
neutron # is ___ - ___?
mass # - proton #
mass number _______ to atomic mass?
NOT equal
ion
charged atom
cation
postively charged ion
anion
negatively charged ion
1 amu (atomic mass unit) is equal to?
1/12 the mass of a carbon-12 atom
atomic mass listed in the periodic table is?
weighted average of all the naturally occurring isotopes
