1) The period of an element tells you a) How many electrons it has b) The number of energy levels it has c) Number of electrons in the outermost energy level  d) How many protons it has 2) The group number of an element tells you a) How many electrons it has b) The number of energy levels it has c) Number of electrons in the outermost energy level  d) How many protons it has 3) The modern periodic table orders elements by their a) Date of discovery b) Atomic number (protons) c) Mass number (protons + neutrons) d) Relative atomic mass (Ar) 4) The early periodic tables ordered elements by their a) Date of discovery b) Atomic number (protons) c) Mass number (protons + neutrons) d) Relative atomic mass (Ar) 5) The plum pudding model only has which sub-atomic particle a) proton b) neutron  c) electron 6) What particles were fired at the thin sheet of Gold which allowed the nucleus to be discovered a) Alpha particles b) Beta particles c) Gamma particles d) Delta particles 7) Niels Bohr discovered what about atoms a) They contained a nucleus b) There are neutrons in the nucleus c) Atoms contain electrons d) Electrons exist in fixed energy levels (shells) 8) James Chadwick discovered what about atoms a) They contained a nucleus b) There are neutrons in the nucleus c) Atoms contain electrons d) Electrons exist in fixed energy levels (shells) 9) The electron arrangement of this atom means it is group a) 2 b) 3 c) 6 d) 7 10) The electron arrangement of this atom means it is in the a) 1st period b) 2nd period c) 3rd period d) 4th period 11) The electron arrangement of this atom means it is in the a) 1st period b) 2nd period c) 3rd period d) 4th period 12) The electron arrangement of this atom means it is in group number a) 1 b) 2 c) 3 d) 4

Atomic structure recap

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