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16 Cards in this Set

  • Front
  • Back
arrangement of the modern periodic table
by mass and atomic number
intensive properties
dont depend on quantity of substance
density, temperature
metallic elements
luster, high heat conductivity,
atoms
building blocks of matter

make elements

all atoms of a given element are the same

atoms of an element arent
changed into different types of atoms by a chemical reaction

compounds are formed when atoms of 1+ elements are combined
isotopes
different number of neutrons
single molecule of an isotope is a nucleid
cathode rays and the cathode ray tube
jj thompson
mass to charge ratio
shows that atoms have a negative charge
metalloids
share properties of both, lie on either side of step
alpha particles
positive
rutherfords model of the atom
PLUM PUDDING!
beta particles
negative
names of groups on periodic table
alkali, alkali earth metals, chalcogens, halogens (nonmetals-most reactive) noble gas, coinage metals
hydrogen oxygen ratio by mass
1.01:16
nonmetals
separated by diagonal step line
extensive properties
mass or volume
gold foil experiment
atoms shot into gold foil,
showed positively charged nucleus
gamma particles
neutral