history of atom Flashcards
what did john doltan think atoms were like
Solid spheres and types of spheres make up the different elements
who made the plum pudding model
jj Thompson
What did jj thompson discover
J J Thomson carried out experiments and discovered the electron
what is the plum pudding model
is a ball of positive charge with negative electrons embedded in it.
what experiment disproved the plum pudding model and who did it
The gold foil experiment and Ernest Rutherford designed it
how do you do the gold foil experiment
positively charged alpha particles were fired at thin gold foil. Most alpha particles went straight through the foil. But a few were scattered in different directions/bounced back
the gold foil experiment led Rutherford to make what model
the nuclear model
what is the nuclear model
idea that an atom has electrons surrounding a nucleus that contains protons and neutrons
in the nuclear model were is the concentration of mass
in the centre which is the nucleus
what is a alpha partical
Subatomic particle comprising two protons and two neutrons (the same as a helium nucleus)
