CHEMISTRY

Who proposed the first modern atomic theory in 1803?

• J.J. Thomson

• John Dalton

• Ernest Rutherford

• Niels Bohr

What model of the atom was proposed by J.J. Thomson?

• Nuclear model

• Plum pudding model

• Solid sphere model

• Quantum mechanical model

Which experiment led to the discovery of the nucleus?

• Cathode ray experiment

• Gold foil experiment

• Oil drop experiment

• Spectroscopy

Who is known for developing the Bohr model of the atom?

• John Dalton

• J.J. Thomson

• Niels Bohr

• Erwin Schrödinger

Which scientist is associated with the concept of quantized energy levels?

• John Dalton

• J.J. Thomson

• Neils Bohr

• Ernest Rutherford

Erwin Schrödinger contributed to atomic theory by developing which model?

• Plum pudding model

• Nuclear model

• Quantum mechanical model

• Solid sphere model

What are the three main components of an atom?

• Protons, neutrons, and isotopes

• Protons, neutrons, and electrons

• Protons, electrons, and oxidation states

• Neutrons, electrons, and isotopes

Where are protons located in an atom?

• In the nucleus

• In the electron cloud

• Orbiting the nucleus

• In the empty space

What is the charge of a neutron?

• Positive

• Negative

• Neutral

• Variable

How many protons are in a carbon atom?

• 6

• 12

• 14

• 8