Isotopes

Front

Isotopes of the same element have the same number of ________ but a different number of _______.

Back

protons, neutrons

Front

An atom of an element with a different number of neutrons and therefore a different atomic mass is called an _______.

Back

Isotope

Front

An atom of phosphorus has an atomic number of 15 and a mass number of 31. How many neutrons does it contain?

Back

16

Front

_______ is the average mass of all the isotopes of an element.

Back

Atomic Mass

Front

The atomic number tells the number of ______ in an atom, which never changes.

Back

Protons

Front

What is the definition of an isotope?

Back

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

Front

How do isotopes of an element differ from each other?

Back

Isotopes differ in their mass number due to the different number of neutrons.

Front

What is the relationship between atomic mass and isotopes?

Back

The atomic mass of an element is a weighted average of the masses of its isotopes.

Front

If an element has an atomic number of 6, how many protons does it have?

Back

6 protons.

Front

What is the mass number of an isotope?

Back

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