Radioactivity- Atoms Flashcards
What is the first model of the atom and who discovered it?
Plum pudding model discovered by JJ Thompson in 1897.
Positive _______ (protons and neutrons) surrounded by negative _________ in ______, discovered by __________.
Positive nucleus (protons and neutrons) surrounded by negative electrons in shells, discovered by Rutherford.
How did Rutherford disprove the plum pudding model?
Rutherford disproved plum pudding model by firing alpha particles at gold foil. The
wide scattering pattern suggested the nucleus.
Electrons can jump to a ______ energy level (further from the _______) with
absorption of ______________ radiation.
Electrons can jump to a higher energy level (further from the nucleus) with
absorption of electromagnetic radiation.
Describe what the plum pudding model was like
A mass of positive charge with negative charged electrons dotted about.