Understanding Isotopes

The video tutorial explains isotopes, focusing on chlorine and lithium. It describes isotopes as elements with the same number of protons but different numbers of neutrons. The tutorial calculates the number of neutrons in chlorine isotopes (chlorine-35 and chlorine-37) using the mass number and atomic number. It also covers lithium isotopes, showing how to determine their mass numbers based on the number of protons and neutrons.

What are the two isotopic forms of chlorine mentioned in the video?

• Chlorine 34 and Chlorine 36

• Chlorine 35 and Chlorine 37

• Chlorine 33 and Chlorine 39

• Chlorine 36 and Chlorine 38

What is the key difference between isotopes of the same element?

• Different number of neutrons

• Different number of electrons

• Different atomic numbers

• Different number of protons

How many neutrons does Chlorine 35 have?

• 18

• 16

• 19

• 17

How many neutrons does Chlorine 37 have?

• 18

• 19

• 20

• 21

Which formula is used to calculate the number of neutrons in an isotope?

• Neutrons = Protons - Mass number

• Neutrons = Protons + Electrons

• Neutrons = Mass number - Protons

• Neutrons = Mass number + Protons

What is the atomic number of lithium?

• 2

• 4

• 5

• 3

How many neutrons are present in the lithium isotope with a mass number of 6?

• 5

• 4

• 3

• 2

What is the mass number of the lithium isotope with 4 neutrons?

• 6

• 9

• 7

• 8

What is the mass number of the lithium isotope with 3 neutrons?

• 5

• 6

• 8

• 7