Early Atomic theory
In chemical reactions, atoms are combined, separated, or rearranged but this is conserved.
What is mass
Thomson was the first person to discover that atoms had _______.
What are electrons
carbon-14 number of neutrons
8
Thomson used an ________ _________ to discover the electron
What is cathode ray tube
mass number of fluorine with 10 neutrons
What is 19
Common model of Thomson's atomic theory
What is plum pudding
atomic number 26
number of neutrons 30
What are iron-56
The glowing beam of light (cathode ray) in his experiment was attracted to (positive/negative) plate.
What is positive?
Describe Rutherford's hypothesis based on Thomson's atomic model.
All of the particles should continue straight through the gold foil.
mass number of silicon with 16 neutrons
30
True or False: all atoms of the same element are exactly the same.
What is false
What is the oil drop experiment?
This showed the atom is mostly empty space
What is most of the alpha particles went straight through
Mass number of titanium with 26 neutrons
48