Oxygen Isotopes and Their Properties

The video explores the isotopes of oxygen, focusing on stable isotopes like oxygen-16, oxygen-17, and oxygen-18. It explains that isotopes differ in the number of neutrons, affecting their mass numbers. The video also discusses the concept of average atomic mass, which reflects the abundance of isotopes. Additionally, it touches on the radioactive isotope oxygen-15, used in medical imaging.

What remains constant across all isotopes of an element?

• Mass number

• Number of protons

• Number of neutrons

• Atomic mass

How many neutrons does oxygen-16 have?

• 9

• 7

• 6

• 8

What is the mass number of oxygen-17?

• 17

• 18

• 16

• 15

Which isotope of oxygen has 10 neutrons?

• Oxygen-18

• Oxygen-17

• Oxygen-19

• Oxygen-16

What is the primary factor that affects the average atomic mass of an element?

• The number of protons

• The chemical properties

• The number of electrons

• The abundance of its isotopes

Why is the average atomic mass of oxygen close to 16?

• Because oxygen-17 is the most abundant isotope

• Because oxygen-16 is the most abundant isotope

• Because all isotopes have the same mass

• Because oxygen-18 is the most abundant isotope

What is the approximate average atomic mass of oxygen as shown on the periodic table?

• 16.001

• 16.000

• 15.999

• 16.002

Which isotope of oxygen is radioactive?

• Oxygen-17

• Oxygen-16

• Oxygen-18

• Oxygen-15

What is a common use of the radioactive isotope oxygen-15?

• Manufacturing semiconductors

• Medical imaging

• Water purification

• Fuel for nuclear reactors

Why doesn't oxygen-15 remain stable for long?

• It has too many electrons

• It is highly reactive

• It has too many protons

• It is radioactive