Atomic model

The word atom comes from the Greek "atomos" which means?

• Very tiny

• Indivisible

• Molecule

• Ouch I jammed my toe

Which of the following was not a part of Dalton's theory of the atom?

• All elements are composed of atom

• Atoms of the same elemements have the same mass and atoms of different elements have different masses

• Compounds contain atoms of more than one element

• All atoms have the same number or protons, electrons, and neutrons

Which of the following best fits Thomson's model of the atom?

• Homer Simpson

• Chocolate cake

• Plum Pudding

• Can of Diet Pepsi

What discovery was accounted for in Rutherford's model of the atom?

• A positively charged nucleus

• Electrons

• The northwest passage

• Neutrons

The Bohr Model of the atom says that electrons:

• Move at a very high velocity around the nucleus

• Electrons exist at different energy levels in orbit around the nucleus

• Electrons can move between energy levels when they gain or lose energy

• All of the above are true about the Bohr model

Which of the Bohr’s postulates was incorrect?

• Energy of electrons is quantized

• Momentum of electrons is quantized

• Electrons release energy when shifting from excited state to ground state

• Electrons revolve around the nucleus in fixed circular orbits

When an electron shifts to an inner shell, it:

• Absorbs photon

• Emits a photon

• Emits a positron

• Absorbs a positron

Around 1911, Rutherford suggested a planetary model of atomic structure. Which of the following was not a proposition of this model?

• Electrons revolve in circular orbits around the nucleus

• Nucleus consists of protons and neutrons

• Mass of atom is concentrated in the nucleus

• Most of the volume in an atom is void

Which source is associated with a line emission spectrum?

• Electric fire

• Neon street sign

• Red traffic light

• Sun

The name of physicist who discovered the nucleus of atom was

• Democritus

• John Dalton

• Ernest Rutherford

• Vander Waals