What was the main goal of the alchemists?
to turn common metals like lead into gold.
What was the difference between Dalton's model of the atom and Thomson's model?
atoms in Dalton's model were indivisible, in Thompson's model atoms were made up of subatomic particles.
What did Rutherford discover in his gold foil experiment?
he discovered the nucleus, a dense and positively charged region in the center of the atom.
What was the difference between Thomson's model of the atom and Rutherford's model?
In Thompson's model the positive charge was
spread out over the whole atom, in Rutherford's
model the positive charge was concentrated
into a tiny nucleus.
What did Bohr discover about how electrons are arranged in atoms?
he discovered that in an atom are arranged in energy levels/ shells within the atom.
What type of charge does the nucleus have?
What type of charge do electrons have?