Midterm Long Quiz in General Chemistry

Lucy is reading about the idea that matter is composed of tiny, indivisible particles. Who’s principle idea is she learning about?

• Aristotle

• Democritus

• Thomson

• Erwin Schrodinger

During a debate, Tom claims that all matter is continuous, and atoms do not exist. Who's view aligns with Tom's?

• Aristotle

• Dalton

• Thomson

• Rutherford

Mark is explaining that atoms combine in specific ratios without altering themselves. Which principle from Dalton's Atomic Theory is he referencing?

• Atoms are indestructible

• Elements' weights are unique

• Atoms combine in whole-number ratios

• Atoms can change

If a scientist uses a cathode ray tube and discovers a negative particle, who would be credited with this discovery?

• Aristotle

• Michael Faraday

• Ernest Rutherford

• J.J Thompson

In a physics demonstration, a teacher shows how a beam deflects toward a positive charge, indicating the existence of negatively charged particles. What particle is being demonstrated?

• Electrons

• Protons

• Neutrons

• Nucleus

In class, a student discusses how he perceives the atom as a central nucleus surrounded by a cloud of electrons. Which atomic model matches his description?

• Plum pudding model

• Rutherford model

• Bohr model

• Quantum mechanical model

A chemistry teacher talks about a particle with no charge found in the nucleus. Which particle is he/she referring to?

• Proton

• Neutron

• Electron

• Ion

A criminology student says that their model of the atom shows electrons in fixed orbits. Which atomic model are they discussing?

• Quantum mechanical model

• Rutherford model

• Bohr model

• Thomson model

In a historical lesson, a teacher mentions that atoms were thought to be indivisible until late discoveries challenged this idea. Who were the initial proponents of this indivisible theory?

• Daltons and Thomson

• Leucippus and Democritus

• Bohr and Rutherford

• Faraday and Roentgen

If an atom’s mass number is 24 and it has 12 protons, how many neutrons does it have?

• 10

• 12

• 14

• 24