Chapters 27, 28, & 30: Quantum Physics

the name for particles that can be either protons or neutrons

force that holds the protons and neutrons together in the nucleus of an atom

The scientific principle that explains how solar panels work

Proposed that electron energy levels are quantized based on their orbit around the nucleus

The sun generates its energy by nuclear __________ of hydrogen nuclei into helium.

The changing of one element into another by radioactive decay

In ____ decay, an electron is emitted.

the number of decays per second, or decay rate, of a radioactive substance

Won a Nobel Prize in physics for work on the photoelectric effect

Won a Nobel Prize in physics & chemistry for work on radioactivity

Suggested that all matter has wave properties.

the sum of the protons and neutrons in the nucleus of the atom

the number of protons in the nucleus of an atom

unit of mass approximately equal to the mass of a single proton or single neutron

When an electron moves from an excited state to its ground state, it _____________ energy.

a lesser force acting in nucleons apparent during beta decay

The mass of the assembled nucleus is ______ than the sum of its parts.

The energy of a photon is directly proportional to its _______.

In his “gold foil experiment” he determined that an atom isn't a "plum pudding" but instead has a massive nucleus.

In ____ decay, a helium nucleus is emitted.

the state of an atom that has absorbed energy

the energy equivalent of the mass defect according to E=mc²

The ____ states that the position and momentum of a particle cannot be measured simultaneously.

Light exists in bundles of energy called __________.

the difference between the mass of a nucleus and the sum of the masses of the individual nucleons that make it up

In ____ decay, a photon is emitted.

The region in which there is a high probability of finding an electron is the _____________.

the time required for half the nuclei of a given quantity of a radioactive isotope to decay

the lowest energy state occupied by an electron

99% of the mass of an atom lies within the ________.