Understanding Atomic Theory: A Historical Perspective

Who were the first philosophers to come up with the idea that matter is composed of tiny particles?

• Einstein and Bohr

• Democritus and Leucippus

• Rutherford and Thompson

• Goldstein and Heisenberg

What does the term 'atomos' mean?

• Integrated

• Infinite

• Interconnected

• Indivisible

Which model of the atom is described as having electrons distributed randomly in a positively charged matrix?

• Quantum Model

• Plum Pudding Model

• Rutherford Model

• Bohr Model

What significant discovery did Ernest Rutherford make from his gold foil experiment?

• Atoms can be split

• Atoms consist mostly of empty space

• Electrons are negatively charged

• Protons are in the nucleus

What did Niels Bohr predict using his model?

• The behavior of electromagnetic energy

• The positions of electrons within the atom

• The exact path of electrons

• The indivisibility of atoms

What did Werner Heisenberg's theory propose about electrons?

• They are only waves

• They can be precisely measured

• They are only particles

• They have properties of both particles and waves

What is the modern model of the atom often called due to its depiction?

• Plum Pudding Model

• Orbital Model

• Cloud Model

• Solar System Model

Which particles were discovered by experimenting with discharge tubes?

• Protons and Alpha particles

• Electrons and Neutrons

• Electrons and Protons

• Neutrons and Protons

What did the law of conservation of mass, proposed by Antoine Lavoisier, state?

• Mass decreases in nuclear reactions

• Mass is always conserved in a chemical reaction

• Mass increases with energy

• Mass can neither be created nor destroyed

What did J.J. Thompson conclude about cathode rays?

• They were light waves

• They were a form of energy

• They were negatively-charged particles

• They were neutral particles