Atomic Theory Quiz

Who originally proposed the concept that matter is composed of tiny, indivisible particles?

• Aristotle

• Dalton

• Democritus

• Rutherford

Whose work is credited with being the beginning of modern atomic theory?

• Newton

• Dalton

• Bohr

• Einstein

What was Aristotle's objection to the atomic theory?

• He believed in the existence of atoms.

• He thought matter was continuous.

• He supported Democritus' ideas.

• He had no objections.

What particles are found in the nucleus of an atom?

• Electrons and protons

• Neutrons and electrons

• Protons and neutrons

• Electrons only

What is the charge of the nucleus?

• Negative

• Neutral

• Positive

• Variable

How was the overall charge distributed in the plum pudding model?

• Evenly distributed positive charge with embedded electrons

• Concentrated positive charge with orbiting electrons

• Neutral charge with scattered protons

• Positive charge at the center with orbiting neutrons

How did the charge distribution in the plum pudding model affect alpha particles passing through an atom?

• Alpha particles were deflected by the nucleus.

• Alpha particles passed through without deflection.

• Alpha particles were absorbed by electrons.

• Alpha particles were repelled by neutrons.

What is the main idea of Dalton's atomic theory?

• Atoms are indivisible and indestructible.

• Atoms are made of smaller particles.

• Atoms can be created and destroyed.

• Atoms are continuously divisible.

Which part of Dalton's theory was later found to be erroneous?

• Atoms of the same element are identical.

• Atoms combine in simple whole-number ratios.

• Atoms are indivisible.

• Atoms can be rearranged in reactions.

Explain why Democritus was unable to experimentally verify his ideas.

• Lack of scientific methods

• Lack of interest

• Lack of support

• Lack of resources