Isotopes Practice 1 (Make up)

Front

What is an isotope?

Back

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

Front

What do isotopes of an element have in common?

Back

Isotopes of an element have the same atomic number (number of protons) and the same number of electrons.

Front

What varies between isotopes of an element?

Back

The number of neutrons and the atomic mass vary between isotopes of an element.

Front

How do you calculate the mass number of an isotope?

Back

The mass number of an isotope is calculated by adding the number of protons and neutrons.

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 neutrons does Lithium-7 have?

Back

Lithium-7 has 4 neutrons (7 mass number - 3 protons = 4 neutrons).

Front

What is the mass number of an isotope with 6 protons and 8 neutrons?

Back

The mass number is 14 (6 protons + 8 neutrons = 14).

Front

Which isotope has 24 protons and 39 neutrons?

Back

Chromium-63 has 24 protons and 39 neutrons.

Front

How many neutrons are in Potassium-39?

Back

Potassium-39 has 20 neutrons (39 mass number - 19 protons = 20 neutrons).

Front

What is the difference between atomic mass and mass number?

Back

Atomic mass is the weighted average mass of an element's isotopes, while mass number is the total number of protons and neutrons in a specific isotope.