atomic structure Flashcards
1
Q
state the evolution of the understanding of the atom and who discovered it
A
ancient greeks-thought matter to be made of indivisible particles
jj tomson-created Ehe ‘plum pudding’ model
ERNEST RUTHERFORD discovered the nucleus was smell and positively charged by finding most alpha particles went straight through sold leaf very few deflected back
NEILS BOHR deduced electrons exist in shells. JAMES CHADWICK determined that the nucleus must contain NEUTRONS as well as protons
2
Q
what are the relative charge/mass of protons neutron electrons
A
protons- +1 1
neutron- 0 1
electrons- -1 0 (very small)
