Victor's Assessment, Atomic Structure & Mass Spectrometry Quiz

Who proposed that atoms are indivisible solid spheres?

• Rutherford

• J.J. Thomson

• John Dalton

• Niels Bohr

Which scientist discovered the electron?

• Rutherford

• J.J. Thomson

• Dalton

• Bohr

J.J. Thomson's atomic model is called:

• Nuclear model

• Plum pudding model

• Quantum model

• Planetary model

Which experiment led Rutherford to propose the nuclear model?

• Cathode ray experiment

• Gold foil experiment

• Oil drop experiment

• Cloud chamber experiment

In Rutherford's experiment, most alpha particles passed through the foil because:

• The nucleus repelled them

• Atoms are mostly empty space

• Alpha particles were too small

• Electrons absorbed them

Rutherford concluded that the nucleus is:

• Large and light

• Small, dense, and positively charged

• Negatively charged

• Spread evenly throughout the atom

Who proposed electrons orbit the nucleus in fixed energy levels?

• Rutherford

• Thomson

• Niels Bohr

• Schrödinger

In Bohr's model, electrons move:

• Randomly

• In clouds of probability

• In fixed shells/energy levels

• Inside the nucleus

The modern quantum model describes electrons as:

• Fixed in shells

• Solid particles

• Clouds of probability (orbitals)

• In circular paths only

Which subatomic particle has a relative mass of approximately 1 and charge +1?

• Electron

• Neutron

• Proton

• Positron