test Flashcards
(18 cards)
publishes atomic theory
John Dalton
discovers positively charged nucleus
Ernest Rutherford
does work that leads to cloud model of atom
Erwin Schrödinger
discovers electron develops plum pudding model of atom
jj thomson
electrons move in orbit around nucleus
neils bohr
confirms existence of neutron
James Chadwick
e-
electron
p+
proton
n0
neutron
atom?
basic unit of matter
when charge is 0 on a element that means…
neutrons are the same
how to find n0
atomic #- mass
protons and electrons are
always the same
positive ions
cations
negative ions
anions
if the type of atom has the same protons and electronss its a
neutral isotope
if the type of atom has the less protons than electrons its a
negative isotope
if the type of atom has the protons are more than electrons its a
+ isotope