Flashcard Isotopes - Mrs. Chacon

Front

What is an isotope?

Back

An isotope is a variant of a chemical element that has the same number of protons but a different number of neutrons, resulting in a different mass number.

Front

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

Back

To find the number of neutrons, subtract the atomic number (number of protons) from the mass number of the isotope.

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

How many protons does Magnesium have?

Back

Magnesium has 12 protons.

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 Magnesium-25 have?

Back

Magnesium-25 has 13 neutrons (25 - 12 = 13).

Front

How many neutrons does Krypton-89 have?

Back

Krypton-89 has 53 neutrons (89 - 36 = 53).

Front

What is the mass number of Iron-58?

Back

The mass number of Iron-58 is 58.

Front

How many protons does Iron have?

Back

Iron has 26 protons.

Front

What is the relationship between protons and neutrons in isotopes?

Back

Isotopes of an element have the same number of protons but different numbers of neutrons.