Isotopes

Question 1

What is an isotope?

Answer 1

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

Question 2

True or False: Isotopes of an element have different chemical properties.

Answer 2

False. Isotopes of an element have the same chemical properties because they have the same number of protons and electrons.

Question 3

Fill in the blank: Isotopes are characterized by their _____ number.

Answer 3

mass

Question 4

Which of the following is an example of a stable isotope? A) Carbon-12 B) Carbon-14 C) Uranium-238

Answer 4

A) Carbon-12

Question 5

What is the primary difference between stable and unstable isotopes?

Answer 5

Stable isotopes do not undergo radioactive decay, while unstable isotopes do.

Question 6

What term describes the process by which unstable isotopes lose energy and matter?

Answer 6

Radioactive decay

Question 7

True or False: All isotopes are radioactive.

Answer 7

False. Not all isotopes are radioactive; many are stable.

Question 8

What is the mass number of an isotope?

Answer 8

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

Question 9

Provide an example of an isotope used in medical imaging.

Answer 9

Technetium-99m

Question 10

How do isotopes of the same element differ in terms of neutrons?

Answer 10

Isotopes differ in the number of neutrons present in their nuclei.