Atomic Theory and Models Quiz

Why might NASA be more inclined to fund a well-known scientist over a lesser-known one?

• Because the lesser-known scientist has a better theory.

• Because the well-known scientist is more creative.

• Because the lesser-known scientist has more experience.

• Because the well-known scientist has more professional influence.

What was Democritus' main contribution to atomic theory?

• He discovered the electron.

• He suggested that atoms are indivisible and in constant motion.

• He proposed that everything is made of four elements.

• He developed the scientific method.

Which of the following was NOT a part of Dalton's atomic theory?

• Atoms are indivisible particles.

• Atoms of the same element are identical.

• Atoms can be created and destroyed.

• Atoms combine in simple whole number ratios.

What did J.J. Thomson's cathode ray experiment demonstrate?

• Atoms contain negatively charged particles.

• Atoms have a dense nucleus.

• Atoms are made of four elements.

• Atoms are solid spheres.

What was the unexpected result of Rutherford's gold foil experiment?

• The foil absorbed all alpha particles.

• Some alpha particles were deflected or bounced back.

• All alpha particles passed through the foil.

• The alpha particles changed color.

What did Niels Bohr propose about electron movement?

• Electrons move randomly around the nucleus.

• Electrons move in fixed orbits around the nucleus.

• Electrons are stationary around the nucleus.

• Electrons move in a straight line.

What is the main idea of Schrödinger's Electron Cloud Model?

• Electrons travel in fixed orbits.

• Electrons are stationary.

• Electrons are part of the nucleus.

• Electrons are found in specific regions called clouds.

What does the current atomic model state about the nucleus?

• It is large and contains only protons.

• It is small, dense, and contains protons and neutrons.

• It is empty space.

• It is made of electrons and protons.

How did scientists build on each other's work to develop the atomic model?

• By ignoring previous theories.

• By testing theories and sharing findings.

• By working in isolation.

• By focusing only on their own experiments.

What is the significance of the scientific process in the development of atomic theory?

• It focused solely on individual achievements.

• It led to the rejection of all previous models.

• It enabled collaboration and refinement of ideas.

• It allowed for the discovery of new elements.