chem final Flashcards
John dalton
billiards ball, atom are solid spheres
What experiment did jj thompson use
Cathode ray tube expiriment
JJ thompson
PLum pudding, atoms contain negetive charged electron, positive charged cloud
Ernest rutherford
Solar system, Positive charged nucleus
who used the gold foil expirmemnt
Ernest Rutherford
Neils bohr
Specific energy levels or shells.
Who used the atomic line spectra expirement
Neils Bohr
Group number equals
Number of valence electrons
Cations
positive charge, loss of elecetrons
Anions
negative charge, gain of electrons
explain which atoms form cations and anions
Metals form cations and non-metals form anions
do Molecular compiunds share electrons or gain or loose.
share
do you reduce molecular compounds
no
non polar
linear and counterbalanced
polar
repels
chemical change
results in a new substance
What is the Law of conservation of energy
Energy cannot be created or destroyed it can be transfered or transfromed
endothermic reaction
Energy is absorbed
Exothermic
energy is given off
