Pre-AP Chemistry: Atomic Structure Quiz

Which ancient philosopher proposed that everything is made up of water, fire, earth, and air?

• Aristotle

• Democritus

• Socrates

• Plato

What was the major discovery made by JJ Thompson in the field of atomic structure?

• Nucleus

• Protons

• Neutrons

• Electrons

Which experiment led to the discovery of the atomic nucleus?

• Cathode Ray Experiment

• Gold Foil Experiment

• Oil Drop Experiment

• Double-Slit Experiment

In the Bohr model, how are electrons arranged around the nucleus?

• Randomly scattered

• In pairs

• In a cloud

• In fixed orbits

What is the main difference between the Bohr model and the quantum model of the atom?

• Atomic mass calculation

• Existence of protons

• Electron orbits vs. orbitals

• Presence of a nucleus

What does the atomic number of an element represent?

• Number of protons

• Number of electrons

• Number of neutrons

• Atomic mass

How do isotopes of an element differ from each other?

• Atomic number

• Number of protons

• Number of electrons

• Number of neutrons

What is the charge of an ion with more electrons than protons?

• Neutral

• Positive

• Variable

• Negative

How is the average atomic mass of an element calculated using isotopes?

• By considering the abundance of each isotope

• By counting the total number of neutrons

• By averaging the number of protons

• By adding the masses of all isotopes

What does mass spectroscopy help determine in chemistry?

• Electron configuration

• Atomic number

• Average atomic mass

• Chemical reactivity