Isotopes/Structure of an Atom Mastery Check

Front

What is an isotope?

Back

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

Front

How do you calculate the mass number of an atom?

Back

The mass number is calculated by adding the number of protons and neutrons in the nucleus of an atom.

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

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.

Front

If an element has 10 protons and 10 neutrons, what is its mass number?

Back

20 (10 protons + 10 neutrons = 20).

Front

What distinguishes one element from another?

Back

The number of protons in the nucleus distinguishes one element from another.

Front

What are the two main types of particles in the nucleus of an atom?

Back

Protons and neutrons.

Front

What is the significance of neutrons in an atom?

Back

Neutrons contribute to the mass of an atom and help stabilize the nucleus.

Front

How many neutrons are in carbon-14?

Back

8 neutrons (14 mass number - 6 protons = 8 neutrons).

Front

What is the difference between isotopes of the same element?

Back

Isotopes of the same element differ in the number of neutrons.