Stars, Atoms, and Elements Review

Front

What is the atomic number of an element?

Back

The atomic number of an element equals the number of protons in an atom of that element.

Front

What is the mass of a neutron?

Back

A neutron has a mass of 1 amu.

Front

What happens to a low mass star after the main sequence?

Back

After the main sequence, a low mass star becomes a red giant.

Front

Which particle in an atom is negatively charged?

Back

The electron is the negatively charged particle in an atom.

Front

What occurs during nuclear fusion?

Back

In nuclear fusion, smaller atoms are forced together to create larger atoms, releasing energy.

Front

Define an atom.

Back

An atom is the smallest unit of an element, consisting of protons, neutrons, and electrons.

Front

What is a proton?

Back

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

Front

What is the difference between mass number and atomic number?

Back

The mass number is the total number of protons and neutrons in an atom, while the atomic number is the number of protons.

Front

What is an isotope?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Front

What is a black dwarf?

Back

A black dwarf is a theoretical stellar remnant that occurs when a white dwarf has cooled sufficiently that it no longer emits significant heat or light.