Isotopes and Mass Number CFU

Front

What is an isotope?

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

How do you calculate the number of neutrons in an isotope?

Back

Number of neutrons = Mass number - Atomic number.

Front

What is the mass number of an isotope?

Back

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

Front

How many neutrons does Calcium-48 have?

Back

28 neutrons.

Front

How many neutrons does Sodium-24 have?

Back

13 neutrons.

Front

How many neutrons does Fluorine-19 have?

Back

10 neutrons.

Front

What is the relationship between isotopes and atomic mass?

Back

Isotopes of an element contribute to the average atomic mass of that element.

Front

What are the two main types of isotopes?

Back

Stable isotopes and radioactive isotopes.

Front

What is a stable isotope?

Back

A stable isotope is one that does not change or decay over time.

Front

What is a radioactive isotope?

Back

A radioactive isotope is one that is unstable and decays over time, emitting radiation.