End of module 3 Review Packet

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is a proton?

Back

A proton is a positively charged particle found in the nucleus of an atom.

Front

What is a neutron?

Back

A neutron is a neutral particle found in the nucleus of an atom, contributing to the mass number.

Front

What is an electron?

Back

An electron is a negatively charged particle that orbits the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in the nucleus of an atom.

Front

What is beta decay?

Back

Beta decay is a type of radioactive decay in which a proton is transformed into a neutron or vice versa, emitting a beta particle.

Front

What does it mean for a nucleus to be stable?

Back

A stable nucleus has a balanced ratio of protons to neutrons, preventing it from undergoing radioactive decay.

Front

What is a radioactive nuclide?

Back

A radioactive nuclide is an atom with an unstable nucleus that can decay and emit radiation.

Front

What is the significance of the proton to neutron ratio?

Back

The proton to neutron ratio is crucial for nuclear stability; an unstable ratio can lead to radioactive decay.

Front

Where are electrons located in an atom?

Back

Electrons are found in spaces around the nucleus, in regions called electron shells or orbitals.