Unit 3 Review

Front

What are isotopes?

Back

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

Front

What is the significance of neutrons in isotopes?

Back

Neutrons determine the mass of an isotope and can affect its stability.

Front

How do you determine the atomic mass of an element?

Back

The atomic mass is the weighted average of the masses of an element's isotopes, based on their natural abundance.

Front

What is the average atomic mass of Gold?

Back

196.967

Front

How many neutrons are in Potassium-39?

Back

20 neutrons.

Front

What is the most abundant isotope of Argon?

Back

Argon-40 (Ar-40) is the most abundant isotope.

Front

What is the relationship between protons and atomic number?

Back

The atomic number of an element is equal to the number of protons in its nucleus.

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

What is the difference between atomic mass and mass number?

Back

Atomic mass is a weighted average of all isotopes, while mass number is the total count of protons and neutrons in a specific isotope.