Atomic Structure
What are the three parts of an atom?
proton, neutron, electron
The first scientist to propose that electrons orbited a small, dense and positively charged nucleus.
Ernest Rutherford
The number of electrons an orbital can hold on the first shell
2
Who was the first scientist to suggest that electrons orbit the nucleus at specific distances?
Niels Bohr
Which part of an atom has a negative charge?
Electrons have a negative charge.
He discovered the electron
J.J. Thomson
How much smaller is the nucleus than the atom
10000 times
Which scientist carried out the gold foil experiment?
Ernest rutherford
Which part(s) of an atom make up most of the ATOMIC MASS?
The nucleus
Thomson's model of the atom was called the "....." model
Plum Pudding
The approximate size of an atom
100 picometers
Which scientist said that the atom was a positively charged mass embedded with negatively charged electrons?
JJ Thompson
The two sub-atomic particles that make up the nucleus.
What are protons & neutrons?
Which scientist discovered the neutron
James Chadwick
True
Which scientist developed the nuclear model of the atom?
Earnest Rutherford
Describe each part of an atom in terms of its location.
Protons and neutrons make up the nucleus, while electrons move around the nucleus in a cloud-like region.
True or False?
In the currently accepted model of the atom, electrons move in defined orbits 
around the nucleus.
False, electrons are in an electron cloud
Most of the positive particles shot at the gold foil in Rutherford’s experiment did what
passed directly through the foil without deflecting
What was James Chadwick's contribution to the structure of the atom?
discovery of the neutron