Understanding Mass Number and Atomic Mass

The video tutorial explains the concept of mass number, using sulfur as an example, by adding the number of protons and neutrons. It then discusses isotopes and how they contribute to the atomic mass, using carbon isotopes as an example. The atomic mass is a weighted average of an element's isotopes.

What is the mass number of sulfur if it has 16 protons and 16 neutrons?

• 32

• 8

• 16

• 64

Which of the following is an example of isotopes of carbon?

• Carbon-10 and Carbon-12

• Carbon-12 and Carbon-14

• Carbon-14 and Carbon-16

• Carbon-10 and Carbon-14

How is the atomic mass of an element determined?

• By averaging the mass of its isotopes

• By counting the number of protons

• By adding the number of protons and neutrons

• By measuring the element's density

What is the atomic mass of carbon as mentioned in the video?

• 12

• 13.5

• 14

• 12.011

What does the atomic mass represent?

• The total number of protons

• The sum of protons and electrons

• The total number of neutrons

• The average mass of an element's isotopes