Atomic Models & Scientists

Which scientist was the first person responsible for proposing the discovery of the electron?

• Democritus

• John Dalton

• Ernest Rutherford

• J.J. Thomson

• Niels Bohr

Which scientist proposed the idea that the electrons circling (orbited) around the nucleus?

• Democritus

• John Dalton

• Rutherford

• J.J. Thomson

• Bohr

Which model of the atom describes the location of electrons as probable within a dense "cloud" surrounding the nucleus of an atom?

• The Billiard Ball Model

• The Plum Pudding Model

• The Bohr Model

• The current model

• The Nuclear Model

Which scientist performed the Gold Foil Experiment??

• Democritus

• John Dalton

• Ernest Rutherford

• J.J. Thomson

• Niels Bohr

Showed the atom was mostly empty space, and that the nucleus was small, dense, and positively charged.

• Rutherford

• Thomson

• Bohr

• Democritus

Where does the current model show electrons?

• s,p,d,f energy levels

• a,b,c,d energy levels

• e,g,h,i energy levels

• none of the above

Who performed the Gold Foil Experiment?

• J. J. Thomson
• Ernest Rutherford
• Neils Bohr
• John Dalton

Identify the element X.

• Cr

• Mg

• N

• Si

How many neutrons are in Carbon-12? Why?

• 6, atomic number is subtracted from the mass number

• 6, atomic number is added to the mass number

• 12, atomic number is subtracted from the mass number

• 12, atomic number is added to the mass number