2. Atomic Structure and Light

What was Niels Bohr's significant contribution to the development of modern atomic theory?

• Electron randomness

• Wave movement

• Neutron discovery

• Quantized levels

What does Schrödinger's wave function describe?

• Electron trajectory

• Wave color

• Electron probability

• Orbital size

Which scientists discovered that different elements show specific colors and lines in a spectroscope?

• Isaac Newton and Joseph von Fraunhofer

• Gustav Kirchhoff and Robert Bunsen

• Robert Bunsen and Niels Bohr

• Gustav Kirchhoff and Isaac Newton

Who discovered the element helium during a solar eclipse in 1868?

• Theodore Lyman

• Anders Jonas Ångström

• Joseph von Fraunhofer

• Niels Bohr

What is the simplest atomic structure in the universe?

• Nitrogen

• Hydrogen

• Carbon

• Oxygen

Who proposed the Solar System model of the atom where the electron moves around the nucleus only in certain allowed circular orbits?

• Niels Bohr

• Louis de Broglie

• Erwin Schrodinger

• Werner Heisenberg

What principle states that no two electrons can have the same combination of quantum numbers?

• Pauli Exclusion Principle

• Heisenberg Uncertainty Principle

• Bohr's Principle

• Schrodinger's Principle

Which physicist suggested that all matter has both wave-like and particle-like properties?

• Louis de Broglie

• Niels Bohr

• Werner Heisenberg

• Erwin Schrodinger

What is the term used to describe the 3-dimensional region of space where it is most probable to find an electron?

• Orbital

• Orbit

• Pathway

• Trajectory

What is the maximum number of electrons that can be in an orbital?

• 1

• 4

• 2

• 3